What Causes Peyronie’s Disease? 6 Risk Factors Explained

What causes Peyronie’s disease is not completely understood. The leading explanation is that repeated minor injury or a more noticeable bending injury affects the tunica albuginea, and in a susceptible man the tissue heals abnormally, producing excess fibrous scar tissue called plaque. Genetics, a tendency toward other fibrotic conditions, diabetes, vascular health, smoking, erectile dysfunction, ageing and certain penile or pelvic procedures may influence risk. However, many men diagnosed with Peyronie’s disease cannot identify one specific event that caused it.

That final point is important because one of the first questions many men ask after developing a new penile curve is, “What did I do wrong?” A patient may remember a particular sexual position, an episode when the penis bent during intercourse, years of masturbation, treatment for erectile dysfunction or a previous prostate operation and wonder whether that event is responsible. Others become frustrated because they cannot remember any injury at all.

Peyronie’s disease rarely provides such a simple explanation. The penis experiences mechanical pressure, bending and stretching throughout adult life. Most minor injuries heal normally and never produce permanent curvature. Peyronie’s disease appears to develop when mechanical stress interacts with an individual's tendency to produce an exaggerated fibrotic healing response. Instead of the repair process resolving normally, excess collagen and other components of scar tissue remain within the tunica albuginea.

This means that trauma is important, but trauma alone does not explain the disease. Millions of sexually active men expose the penis to similar mechanical forces without developing Peyronie’s plaque. Researchers therefore increasingly view the condition as a multifactorial disorder involving injury, wound healing, genetics, metabolic health and connective-tissue biology.

For the patient, this distinction matters. Understanding what may contribute to Peyronie’s disease can help identify modifiable health factors, but the search for a single guilty event should not overshadow the more useful questions: Is the disease still active? Is the curvature changing? Is erectile function affected? And what treatment, if any, is appropriate now?

What Actually Happens Inside the Penis in Peyronie’s Disease?

To understand what causes Peyronie’s disease, it helps to understand where the scar develops. The penis contains two main erectile chambers known as the corpora cavernosa. These chambers fill with blood during erection. Surrounding them is a strong but flexible layer of connective tissue called the tunica albuginea. As pressure rises inside the erectile chambers, the tunica stretches and helps contain that pressure, allowing the penis to become firm.

In a healthy erection, the tunica on both sides of the penis expands relatively evenly. In Peyronie’s disease, one region becomes fibrotic and loses some of its normal elasticity. When the surrounding healthy tissue stretches during erection, the scarred segment cannot lengthen to the same degree. The result is mechanical imbalance, which can pull the erection toward the affected side and create curvature.

The same process can create other deformities. If the scar contracts over a broader area, the penis may become shorter. If one segment cannot expand normally in girth, a visible indentation may develop. When narrowing surrounds much of the circumference, the shaft can take on an hourglass appearance. Severe narrowing can also create a mechanical hinge that causes buckling during penetration.

This explains why Peyronie’s disease should not be thought of simply as “a bent penis.” The underlying problem is abnormal fibrosis of the tunica, and the visible curvature is only one possible result.

The fibrotic process involves several cellular pathways. Following injury, the body normally recruits inflammatory cells and fibroblasts to repair damaged tissue. Fibroblasts produce collagen and other extracellular-matrix components needed for healing. Some fibroblasts become myofibroblasts, which help contract and strengthen the repair site. In normal wound healing, this process eventually switches off. In Peyronie’s disease, the fibrotic response appears to persist beyond what is necessary, allowing excess scar tissue to accumulate.

This abnormal healing biology is central to the modern understanding of the condition. It helps explain why the disease can develop after seemingly modest trauma, why some men are more susceptible than others and why fibrotic conditions elsewhere in the body are associated with Peyronie’s disease.

For the broader clinical picture, including symptoms and active versus stable disease, see the [Peyronie’s disease](/en/conditions/peyronies-disease) page.

Risk Factor 1: Repeated Microtrauma or a Penile Bending Injury

The most widely accepted trigger model for Peyronie’s disease involves repeated microtrauma to the tunica albuginea. The penis experiences considerable mechanical stress during intercourse, especially when fully or partially erect. If the shaft slips out during penetration and strikes the partner's pelvis or perineum, it can bend suddenly. Even without a dramatic injury, repeated smaller episodes of bending may create microscopic tissue damage.

Most men will never notice these small injuries. There may be no bruising, swelling or loss of erection. The tissue simply repairs itself. In men predisposed to Peyronie’s disease, however, that repair process may become abnormally fibrotic. Collagen accumulates, a plaque forms and the tissue becomes less elastic.

Some patients remember a very specific event. They may say that the penis bent sharply during intercourse, hurt for several minutes and then seemed normal. Weeks or months later, they notice a hard area or a new curve. That history fits the current microtrauma model well.

However, many patients remember absolutely nothing unusual. This does not argue against Peyronie’s disease. Microtrauma can be too subtle to notice, and scar tissue does not necessarily become clinically obvious immediately. The biological process may begin before the patient sees any change in the erection.

A useful way to understand this is that mechanical injury may provide the trigger, but susceptibility determines the response. Two men can experience similar penile bending. One heals without consequences. The other develops a persistent plaque. The difference may lie in genetics, metabolic health, vascular function, age-related tissue biology or other factors that influence wound healing.

This distinction also helps answer an emotionally difficult question: Did sex cause my Peyronie’s disease? Ordinary consensual sexual activity should not be considered something a patient did wrong. The penis is biologically designed for intercourse and naturally experiences mechanical forces. Peyronie’s develops only in a minority of men despite sexual activity being extremely common.

Certain situations can obviously create more force than others. Vigorous intercourse when erection quality is declining may make the shaft more likely to buckle. A sudden uncontrolled bend can injure tissue. But even in these circumstances, most injuries do not progress to Peyronie’s disease. The patient's healing response remains an important part of the explanation.

Is Peyronie’s Disease the Same as a Penile Fracture?

Peyronie’s disease and penile fracture are different conditions. A penile fracture is an acute tear of the tunica albuginea that usually occurs during erection. Patients commonly describe a sudden bending event, a cracking or popping sensation, immediate loss of erection and rapid swelling or bruising. It requires urgent medical assessment.

Peyronie’s disease generally develops more gradually. A man may have experienced a mild bending injury without a complete tunical rupture, or he may remember no injury at all. Over subsequent weeks or months, a plaque or deformity becomes apparent.

A penile fracture can potentially lead to later scar formation, particularly if not managed appropriately, but Peyronie’s disease should not be described simply as an old penile fracture.

Can Weak Erections Increase Mechanical Stress?

Possibly. A partially rigid penis is less structurally stable during penetration and may buckle more easily. This creates an important relationship between Peyronie’s disease and erectile dysfunction.

Some patients have erectile dysfunction before developing Peyronie’s disease. Diabetes, vascular disease, ageing or other conditions reduce rigidity, and the penis repeatedly bends during intercourse. That mechanical instability may increase exposure to microtrauma.

Later, Peyronie’s disease itself can further worsen sexual function through pain, curvature, narrowing and performance anxiety. The relationship can therefore become cyclical: poorer erection quality increases buckling risk, while the resulting deformity makes erections and intercourse more difficult.

This is one reason erectile function should always be assessed as part of a Peyronie’s consultation rather than treating plaque and curvature in isolation. More information is available on the [erectile dysfunction](/en/conditions/erectile-dysfunction) page.

Risk Factor 2: Genetics and a Biological Tendency Toward Fibrosis

Mechanical trauma alone cannot explain Peyronie’s disease. If every minor tunical injury resulted in a plaque, the condition would be far more common. Researchers have therefore spent decades investigating whether some men are biologically more likely to form excessive scar tissue.

One of the strongest clues comes from the relationship between Peyronie’s disease and Dupuytren’s contracture. Dupuytren’s disease is a fibroproliferative disorder affecting the connective tissue of the hand. Fibrous cords develop beneath the skin of the palm and can progressively pull one or more fingers into a flexed position.

The penis and palm have completely different functions, but both diseases involve abnormal fibroblast activity, collagen deposition and tissue contracture. Men with Dupuytren’s contracture appear to have a higher prevalence of Peyronie’s disease than the general male population. Some families also show clustering of these fibrotic conditions.

This does not mean scientists have identified one simple “Peyronie’s gene.” Fibrotic diseases are biologically complex. Multiple genes and regulatory pathways probably contribute to how the body responds to injury and controls collagen production.

Research has investigated inflammatory signalling, transforming growth factor pathways, oxidative stress, fibroblast behaviour and extracellular-matrix regulation. These mechanisms help determine whether an injury heals normally or progresses to persistent fibrosis.

The genetic connection is also useful when counselling patients who say, “I never injured myself, so how could I have Peyronie’s?” If a man has a predisposition toward abnormal fibrosis, only minimal microtrauma may be needed to begin the process, and that trauma may never have been noticeable.

Does Peyronie’s Disease Run in Families?

Peyronie’s disease can appear in families, but most patients do not report an obvious family history. There are several reasons for this. The genetic contribution is probably complex rather than determined by a single inherited mutation. Not everyone who inherits susceptibility will develop disease. Older generations may also have concealed the condition because penile problems were rarely discussed openly.

A father or brother with Peyronie’s disease therefore supports a possible genetic predisposition, but the absence of family history does not reduce the likelihood of diagnosis substantially.

What About Ledderhose Disease?

Another related fibrotic condition is Ledderhose disease, also known as plantar fibromatosis. It causes fibrous nodules within the connective tissue of the feet. Like Dupuytren’s disease, it belongs to a wider family of fibroproliferative disorders.

The association between these conditions reinforces a central point: Peyronie’s disease is not simply the consequence of sexual activity. It reflects how connective tissue behaves in certain individuals.

A clinician may therefore ask about firm cords in the palms, difficulty straightening the fingers or nodules in the soles of the feet when evaluating someone with Peyronie’s disease.

Risk Factor 3: Diabetes and Metabolic Health

Diabetes is frequently discussed in Peyronie’s disease because it affects many of the biological systems involved in tissue health. Long-term elevated blood glucose can damage small blood vessels, alter collagen structure, increase oxidative stress, change inflammatory signalling and impair normal wound healing.

Collagen exposed to prolonged hyperglycaemia can undergo glycation, which changes its physical properties. Tissue may become stiffer and less elastic. Diabetes can also interfere with the normal balance between collagen deposition and breakdown during wound repair.

These mechanisms make an association between diabetes and abnormal fibrosis biologically plausible.

Diabetes also has an indirect relationship with Peyronie’s disease through erectile dysfunction. It is one of the major medical causes of ED because it can damage blood vessels and nerves involved in erection. A penis that does not become fully rigid may be more likely to bend during intercourse, potentially increasing mechanical stress on the tunica.

This creates several possible pathways linking diabetes and Peyronie’s disease: altered tissue quality, abnormal healing, poorer vascular function and greater mechanical instability.

It would still be inaccurate to tell a patient that diabetes directly caused his Peyronie’s disease. Many men with diabetes never develop a penile plaque, and many men with Peyronie’s have normal glucose metabolism. Diabetes should therefore be viewed as a risk modifier, not a guaranteed cause.

Does Better Diabetes Control Reverse Peyronie’s Disease?

Controlling diabetes is important for general health, vascular health, erectile function and surgical healing. It should be optimized in any man being evaluated for sexual dysfunction or reconstructive surgery.

However, improving HbA1c should not be presented as a treatment that dissolves mature Peyronie’s plaque. Once established fibrosis has developed, metabolic optimization alone is unlikely to completely reverse the structural scar.

The value of good diabetic control lies in improving the biological environment in which the penis functions and heals. It may also improve erectile quality in some patients and reduce perioperative risk if surgery is eventually required.

Patients should therefore separate two ideas: reducing medical risk and directly correcting established curvature. Both matter, but they are not the same thing.

Metabolic Syndrome and Cardiovascular Health

Diabetes often exists alongside obesity, high blood pressure, high cholesterol and other features of metabolic syndrome. These conditions can damage vascular function and contribute to ED.

Observational studies have reported associations between Peyronie’s disease and several cardiovascular risk factors. These findings do not prove that hypertension or high cholesterol directly create penile plaque. They may instead indicate that men with poorer vascular and metabolic health are more susceptible to abnormal tissue responses or mechanical problems related to weaker erections.

This broader health picture is clinically useful. A Peyronie’s consultation can become an opportunity to assess erectile and cardiovascular health rather than treating the penis as an isolated organ.

Risk Factor 4: Smoking, Vascular Health and Erectile Dysfunction

Smoking is another factor associated with Peyronie’s disease in observational research. The relationship is plausible because tobacco exposure affects both vascular function and wound healing.

Nicotine and other components of tobacco can impair blood flow, reduce tissue oxygenation and alter inflammatory responses. Chronic smoking also damages the endothelium, the inner lining of blood vessels that plays a central role in normal erections.

A man who smokes therefore may face two relevant problems. His penile tissue may have a less favorable healing environment, and his erections may become less rigid because of vascular disease. Both could theoretically increase susceptibility to fibrosis after repeated microtrauma.

It would nevertheless be too strong to say that smoking directly causes Peyronie’s disease. Many smokers never develop it, and many patients with Peyronie’s have never used tobacco.

The evidence is best communicated as an association and a modifiable risk factor.

Stopping smoking is beneficial regardless of whether it changes the existing plaque. It can improve cardiovascular health, support erectile function and improve wound healing if a surgical procedure becomes necessary.

This highlights a recurring theme in Peyronie’s disease: some interventions help the environment surrounding the disease even when they do not directly erase fibrosis.

Does Cardiovascular Disease Cause Peyronie’s Disease?

Cardiovascular disease and Peyronie’s disease share several risk factors, including ageing, diabetes, smoking and endothelial dysfunction. Erectile dysfunction is also frequently an early marker of vascular disease.

The exact relationship is difficult to separate because these factors overlap heavily. A man with hypertension, diabetes and ED may also develop Peyronie’s disease, but it is impossible to assign a percentage of causation to each condition.

The practical clinical response is to treat vascular health seriously. A new sexual-health problem may justify checking blood pressure, diabetes status, lipids and other cardiovascular risks, particularly when erectile function has also declined.

Does Erectile Dysfunction Come Before or After Peyronie’s Disease?

Either sequence is possible.

A man may develop vascular ED first. The resulting softer erections may increase buckling during intercourse and possibly contribute to microtrauma.

Another man may develop Peyronie’s first. Pain, curvature and anxiety then interfere with erection quality.

A third patient may have both because the same diabetes or vascular disease contributes to each problem independently.

For treatment planning, the exact direction of causation is often less important than establishing current erectile function. Whether the patient can reliably achieve a penetration-quality erection has major implications for future treatment, especially surgery.

Risk Factor 5: Prostate Surgery and Other Urological Procedures

Some men report developing Peyronie’s disease after radical prostatectomy or another pelvic procedure. This association can be alarming because patients may assume that the surgeon directly injured the penis.

The relationship is more complicated.

After radical prostatectomy, erectile physiology can change dramatically. Nerves involved in erection may temporarily or permanently lose function. Spontaneous nocturnal erections can decrease. Penile oxygenation and tissue stretching may also change during periods of prolonged ED.

Some men notice a reduction in penile length after prostatectomy, and Peyronie’s disease has been reported in this population. The combination of altered erections, tissue remodeling and postoperative healing may contribute to fibrotic changes.

A patient may also begin paying far more attention to penile anatomy after prostate surgery because sexual rehabilitation becomes an important part of recovery. A subtle pre-existing curvature may therefore be noticed for the first time.

None of these mechanisms means that every postoperative case results from an avoidable surgical injury.

Can Penile Surgery Cause Scar Tissue?

Any procedure involving tissue has the potential to produce scar. Previous penile operations, severe genital injury and other interventions can alter the local anatomy.

However, not all penile scar tissue is Peyronie’s disease.

For example, extensive fibrosis can develop inside the corpora cavernosa after prolonged ischemic priapism, penile implant infection or removal of a prosthesis. This corporal fibrosis is anatomically different from the classic tunical plaque of Peyronie’s disease, although both involve abnormal scar formation.

That distinction becomes especially important in reconstructive and prosthetic surgery because corporal fibrosis can make future implant placement more difficult.

The dedicated [penile fibrosis](/en/conditions/penile-fibrosis) page explains these differences in more detail.

Can Erectile Dysfunction Injections Cause Peyronie’s Disease?

Intracavernosal injections are legitimate, evidence-based treatments for erectile dysfunction. When used correctly, they are generally safe.

Repeatedly injecting the same location, using poor technique or causing repeated local bleeding and tissue injury may contribute to localized fibrosis. This is one reason clinicians teach patients to rotate injection sites and follow the prescribed technique.

Most men who use intracavernosal injection therapy correctly do not develop Peyronie’s disease.

The relationship is further complicated because men requiring injection therapy often already have severe vascular ED or diabetes—conditions that themselves overlap with Peyronie’s risk.

Can Prostate Biopsy Cause Peyronie’s Disease?

Routine prostate biopsy is not considered a common established direct cause of Peyronie’s disease.

Patients sometimes connect two events simply because they occurred during the same period. The fact that curvature was noticed after a procedure does not by itself prove that the procedure caused it.

The clinical diagnosis should still be based on the characteristic features of Peyronie’s disease: acquired curvature, tunical plaque, pain, shortening, indentation and disease progression.

Risk Factor 6: Age and Connective-Tissue Biology

Peyronie’s disease becomes more common during middle and later adulthood. Typical presentation is often in men in their 50s or 60s, although the condition can occur much earlier.

Age itself probably does not directly create plaque. Instead, several age-related biological changes may increase susceptibility.

Connective tissue becomes less elastic with age. Blood-vessel health can deteriorate. Diabetes, hypertension and erectile dysfunction become more common. The penis has also been exposed to decades of ordinary mechanical stress.

Wound healing can change as well. The balance between inflammation, collagen production and tissue remodeling in a 60-year-old may differ from that of a 20-year-old.

These factors create an environment in which a relatively ordinary tissue injury may be more likely to heal with persistent fibrosis.

Still, Peyronie’s disease should never be dismissed as simply “getting old.” A new acquired penile deformity deserves medical evaluation at any age.

Can Younger Men Develop Peyronie’s Disease?

Yes.

Men in their 20s, 30s and 40s can develop the condition. Younger patients may have:

a genetic predisposition;

significant penile trauma;

associated fibrotic conditions;

or no obvious risk factors at all.

Because younger men are more likely to assume that Peyronie’s is an older-man condition, they may initially believe that a new curve must be normal.

The same diagnostic principle applies regardless of age: a new or changing deformity deserves assessment.

Is Peyronie’s Disease an Autoimmune Condition?

Peyronie’s disease involves inflammation and immune signalling, but it is not usually classified as a classic systemic autoimmune disease like lupus or rheumatoid arthritis.

Inflammation is part of normal wound healing and also plays a role in fibrosis. Researchers have therefore studied immune pathways extensively.

The current understanding is better described as a localized fibroproliferative wound-healing disorder than a generalized autoimmune disease.

Why Did I Get Peyronie’s Disease if I Have No Risk Factors?

This is a very common question.

Some men with Peyronie’s disease do not smoke, do not have diabetes, have excellent erections, have no Dupuytren’s contracture, remember no penile trauma and have never undergone prostate surgery.

Their disease is still real.

Risk factors increase probability. They are not diagnostic requirements.

Our current understanding of fibrosis is incomplete. There may be genetic, molecular or environmental factors that medicine cannot yet measure routinely.

The absence of an obvious risk factor therefore does not mean that something was overlooked or that the diagnosis must be incorrect.

It also means that patients should be cautious about anyone claiming to identify the precise cause of their disease from a short online consultation.

In most cases, a physician can describe the likely biological model and relevant risk factors, but cannot identify one event with absolute certainty.

Does Ordinary Sex Cause Peyronie’s Disease?

Men often revisit previous sexual encounters after diagnosis and wonder whether a particular position caused the problem.

Normal sexual intercourse should not be regarded as a disease-causing behaviour.

Sex naturally places mechanical forces on the erect penis. The important issue is whether a significant or repetitive injury occurred and how the tissue responded.

Certain situations can create more risk of traumatic bending. A penis that slips out during penetration and strikes the partner's body can bend sharply. Positions in which the receiving partner controls more of the movement may reduce the man's ability to stop suddenly if the penis slips out, although no sexual position has been proven to universally cause Peyronie’s disease.

The practical message is to avoid obvious traumatic buckling, not to fear normal sex.

Adequate lubrication, good erection quality and stopping when penetration becomes mechanically unstable are reasonable precautions.

Can Masturbation Cause Peyronie’s Disease?

Normal masturbation has not been established as a common cause of Peyronie’s disease.

Aggressively bending an erect penis or repeatedly using a technique that creates tissue pain could theoretically cause injury. But this is very different from saying masturbation itself causes Peyronie’s disease.

Patients should not feel shame or guilt about ordinary masturbation after receiving the diagnosis.

If masturbation is painful because the disease is active, the technique can be modified while symptoms are assessed. The aim is to avoid traumatic force, not to avoid all sexual activity.

Can Stress or Anxiety Cause Peyronie’s Disease?

Psychological stress does not directly produce a fibrous plaque in the tunica albuginea.

However, stress can affect sexual function. Anxiety, depression and chronic stress can reduce erection quality, alter sleep and affect cardiovascular health.

If anxiety leads to partial erections during intercourse, mechanical instability may increase. This represents an indirect pathway rather than evidence that emotional stress itself causes fibrosis.

The relationship also runs in the opposite direction. Peyronie’s disease can generate substantial psychological distress because men may worry about sexual performance, attractiveness, penile length and their partner's reaction.

A genuine anatomical condition and psychological effects can therefore coexist.

Neither should be dismissed.

Can Low Testosterone Cause Peyronie’s Disease?

The relationship between testosterone and Peyronie’s disease has been studied, but research has not established low testosterone as a direct universal cause.

Testosterone influences sexual desire, erection physiology, metabolic health and tissue biology, which makes the question reasonable.

Some studies have found associations while others have not produced convincing evidence that low testosterone determines curvature severity or disease development.

A man with symptoms of testosterone deficiency can be evaluated appropriately, but testosterone replacement should not be presented as a treatment that dissolves Peyronie’s plaque.

Hormonal health and Peyronie’s disease should be managed as related but separate clinical issues unless individual evidence suggests otherwise.

Can Vacuum Pumps Cause Peyronie’s Disease?

Properly used medical vacuum erection devices are not recognized as a common cause of Peyronie’s disease. In fact, vacuum devices are sometimes incorporated into penile rehabilitation or mechanical therapy programs.

Problems are more likely when excessive negative pressure is used or when a device causes repeated bruising, pain or tissue trauma.

Patients should follow the instructions for the specific medical device rather than assuming that stronger suction produces better results.

The same principle applies to traction devices: medically controlled mechanical force may be therapeutic, while uncontrolled traumatic force can injure tissue.

Does Cycling Cause Peyronie’s Disease?

Routine cycling has not been established as a cause of Peyronie’s disease.

Long periods of saddle pressure can affect the perineum, and cycling has been investigated in relation to genital numbness and erectile function.

Those concerns are anatomically different from the tunical fibrosis that characterizes Peyronie’s disease.

A man should therefore not assume that recreational cycling created his penile plaque simply because both involve the genital region.

Does Circumcision Cause Peyronie’s Disease?

Routine circumcision primarily involves the foreskin and superficial penile tissues. Peyronie’s disease develops within the deeper tunica albuginea.

For that reason, circumcision is not considered a typical direct cause of Peyronie’s disease.

As with any procedure, scar formation is possible, but the anatomical type of scar is different.

If a patient notices a new curve after circumcision, it should still be evaluated on its own clinical features rather than assuming automatic causation.

Can a Penile Implant Cause Peyronie’s Disease?

Penile prosthesis surgery creates deliberate changes within the corpora cavernosa and produces a normal healing response around the implanted cylinders.

Fibrosis can develop after implant infection, revision or removal. This type of corporal scar tissue is not generally classified as classic Peyronie’s disease.

The relationship often works in the opposite direction: a patient already has Peyronie’s disease and severe erectile dysfunction, and a penile prosthesis is used to treat both rigidity and curvature.

Distinguishing tunical Peyronie’s plaque from corporal fibrosis is particularly important when planning complex surgery.

Why Does Peyronie’s Sometimes Seem to Appear Overnight?

Many patients say that their penis was normal one week and noticeably curved the next.

The disease may have been developing before it became visually obvious.

A small plaque can exist without producing much deformity. As scar contraction increases or erection quality changes, the curve can suddenly become easier to see.

Another possibility is that a particular injury triggered inflammation in tissue that was already susceptible.

The patient experiences a dramatic moment of recognition, but the biological process may have been evolving for some time.

This is why doctors often ask not only when the patient first noticed the curve, but whether there were earlier symptoms such as pain, plaque or subtle shortening.

Is Peyronie’s Plaque Permanent?

A plaque can change during the course of the disease.

During the active phase, inflammation and remodeling continue. Pain often reduces as the condition stabilizes. The plaque may soften or change somewhat.

Once mature fibrosis is established, however, the plaque can remain palpable indefinitely.

Successful treatment does not necessarily require the plaque to disappear completely.

A patient can regain satisfactory sexual function even if a small fibrotic area remains.

The clinical goal is therefore usually to improve:

curvature;

stability;

erectile function;

pain;

and sexual function,

rather than attempting to make every trace of scar tissue vanish.

Does Knowing the Cause Change the Treatment?

Not usually as much as patients expect.

A man whose Peyronie’s followed a memorable injury and a man who remembers no trauma at all may ultimately receive similar treatment if their present anatomy is the same.

Treatment decisions depend more heavily on:

whether the disease is active or stable;

degree and type of curvature;

penile length;

hourglass or hinge deformity;

erectile function;

and ability to have intercourse.

However, identifying associated risk factors is still useful. Poorly controlled diabetes can be optimized. Smoking can be addressed. Erectile dysfunction can be treated. Significant cardiovascular risk can be evaluated. A patient with Dupuytren’s contracture can be counselled about his underlying fibrotic predisposition.

The cause therefore helps clinicians understand the patient.

The current deformity determines much of the treatment.

Can Peyronie’s Disease Be Prevented?

There is no proven strategy that prevents every case of Peyronie’s disease.

That answer can be frustrating, but it is more accurate than promising that one lifestyle change can eliminate risk.

Genetics cannot be changed. Age cannot be reversed. Not every instance of minor penile microtrauma can be prevented because erections and intercourse naturally create mechanical stress.

Prevention should therefore focus on reasonable risk reduction rather than guarantees.

Maintaining strong erectile function can reduce repeated buckling during intercourse. Men with persistent ED should seek treatment rather than repeatedly attempting penetration with an unstable erection.

Obvious forceful penile bending should be avoided. If the penis slips out during intercourse, movement should stop rather than forcing the shaft back into position while it is bent.

Good lubrication may help reduce uncontrolled mechanical stress.

Diabetes, blood pressure, cholesterol and cardiovascular health should be managed appropriately. Smoking cessation supports vascular and tissue health.

Men using penile injection therapy should follow proper injection technique and rotate injection sites.

These measures are sensible for overall penile health.

None guarantees that Peyronie’s disease will not occur.

Should You Avoid Sex if You Are Worried About Peyronie’s Disease?

Men without symptoms do not need to stop normal sexual activity to prevent Peyronie’s disease.

A man who already has active Peyronie’s disease may need to modify intercourse depending on pain, curvature and mechanical stability.

If the penis has a significant hinge deformity, certain positions can increase the chance of buckling. The patient and partner may need to use positions that provide greater control and reduce excessive bending.

Sex should not be treated as dangerous simply because Peyronie’s disease exists.

The goal is controlled, comfortable sexual activity that avoids obvious trauma.

How Can You Tell Peyronie’s Disease From Congenital Curvature?

This distinction is particularly important for men searching “why is my penis curved?”

Congenital penile curvature is usually present from puberty or from the time the man first began noticing erections. It tends to remain relatively stable and is not caused by a Peyronie’s plaque.

Peyronie’s disease is acquired. A man often remembers that the penis used to be straighter before a new deformity appeared.

Plaque, pain, shortening and progressive change further support Peyronie’s disease.

A 25-year-old man who says, “My penis has always curved downward since I was a teenager,” requires a different diagnostic pathway from a 55-year-old who says, “My penis was straight until six months ago.”

If the curve has existed since puberty, see the dedicated [congenital penile curvature](/en/conditions/congenital-penile-curvature) page.

Can Some Penile Curvature Be Normal?

Yes.

Perfectly straight penile anatomy is not necessary for normal sexual function.

Some men have a natural upward, downward or lateral curve without disease.

The warning signs for Peyronie’s are not simply the existence of curvature. They are acquired change, progression, plaque, pain, shortening, narrowing, instability or interference with intercourse.

This distinction can prevent unnecessary anxiety in men who have always had mild asymmetry.

It also prevents the opposite mistake: dismissing a genuinely new deformity as normal simply because some natural curvature exists in the population.

When Should You See a Urologist?

A newly acquired penile curve should generally be evaluated, particularly when the deformity appears to be progressing.

You should also consider specialist assessment if you notice a firm plaque, pain during erection, shortening, indentation, hourglass narrowing, buckling during intercourse or worsening erectile function.

Early evaluation does not mean that injections or surgery are immediately necessary. One of the major benefits of assessment during the early phase is documentation.

The clinician can record:

the approximate curvature;

penile length;

plaque location;

erection quality;

and whether the disease appears active.

These baseline findings make later progression much easier to judge.

If the problem appears consistent with Peyronie’s disease, the next question becomes whether the condition is still active or has stabilized.

What Should a Proper Peyronie’s Evaluation Include?

The consultation should begin with a detailed history. The clinician will want to know when the patient first noticed pain, plaque or curvature and whether the shape is continuing to change.

Erectile function should be assessed carefully because it strongly influences treatment.

The physical examination usually includes palpation of the penis for plaque and measurement of penile length. The clinician may also look for evidence of Dupuytren’s contracture or other fibrotic disorders.

Because the main deformity appears during erection, objective assessment of the erect penis is important. This may involve appropriately taken home photographs or a medically induced erection in the clinic.

Penile Doppler ultrasound can be useful when erectile dysfunction needs further assessment or when reconstructive surgery is being considered.

The purpose is not simply to confirm that a plaque exists. It is to understand the entire mechanical and erectile problem.

Can Treating the Risk Factors Cure Peyronie’s Disease?

Treating risk factors improves health, but established Peyronie’s disease usually requires its own management.

Stopping smoking improves vascular function.

Managing diabetes improves metabolic health and surgical risk.

Treating erectile dysfunction may improve sexual function and reduce mechanical instability.

Improving cardiovascular health is beneficial for penile blood flow.

These are important interventions.

They should not be marketed as methods that reliably dissolve a mature plaque or straighten a stable 60-degree curve.

Once significant fibrosis has developed, the treatment options depend on disease phase and severity. They can include observation, traction, selected intralesional therapies or surgery.

That distinction protects patients from unrealistic claims that lifestyle changes alone can reverse every structural deformity.

The Most Accurate Answer to “What Causes Peyronie’s Disease?”

If the question had to be answered in one paragraph, the most accurate modern explanation would be this:

Peyronie’s disease probably develops when mechanical stress or injury to the tunica albuginea triggers an excessive wound-healing response in a man who is biologically susceptible to fibrosis. Genetics, connective-tissue disorders, diabetes, vascular disease, smoking, erectile dysfunction, ageing and previous urological treatment may influence susceptibility, but none is necessary in every case and none explains the disease completely.

This model is more scientifically useful than blaming one sexual encounter or one lifestyle choice.

It also reflects an important reality: Peyronie’s disease involves the interaction between what happened to the tissue and how that tissue responded.

Clinical perspective: “Peyronie’s disease is better understood as abnormal scar healing after penile stress than as the result of one mistake or one sexual event.”

That is the message patients often need most when they are newly diagnosed.

The Bottom Line on What Causes Peyronie’s Disease

Peyronie’s disease is an acquired fibrotic disorder, and its exact cause is still not completely understood. The strongest current model combines penile microtrauma with an abnormal healing response in susceptible tissue.

The first important risk factor is repeated microtrauma or penile injury. The tunica albuginea naturally experiences mechanical stress during sex, and occasional bending may create small injuries. Most men heal normally. In susceptible men, excessive collagen and persistent fibrotic tissue can form instead.

The second factor is genetic and connective-tissue susceptibility. The association with Dupuytren’s contracture and related fibrotic disorders strongly suggests that some men are biologically more likely to produce abnormal scar tissue.

The third factor is diabetes and metabolic health. Diabetes can affect collagen, vascular function, inflammation, wound healing and erection quality. It should be considered a risk modifier rather than a direct universal cause.

The fourth is smoking and vascular disease. Tobacco damages blood vessels and impairs healing while also contributing to erectile dysfunction. Smoking does not explain every case, but stopping is beneficial for penile and cardiovascular health.

The fifth factor is previous prostate, pelvic or penile treatment. Peyronie’s disease can appear after radical prostatectomy and other urological interventions, although changes in erection physiology and tissue remodeling may be more important than one direct surgical injury.

The sixth factor is age and connective-tissue biology. Tissue elasticity and wound healing change with age, while vascular disease, diabetes and ED become more common. These factors may collectively increase susceptibility.

None of these factors should be used to blame the patient.

Ordinary intercourse is not something a man did wrong. Normal masturbation is not an established cause. Many men remember no trauma at all. Others have no diabetes, no smoking history and no known family predisposition.

There is also no proven method that prevents every case.

Reasonable prevention focuses on maintaining good erectile and cardiovascular health, controlling diabetes, avoiding smoking, preventing obvious traumatic penile bending and using prescribed injections or mechanical devices correctly.

If a new curve, plaque, shortening or hourglass deformity has already appeared, the most useful next step is not spending months trying to identify one guilty event. It is establishing whether the condition is active, documenting the deformity and assessing erectile function.

For a complete overview, visit [Peyronie’s disease](/en/conditions/peyronies-disease). If deeper penile scarring may be involved, see [penile fibrosis](/en/conditions/penile-fibrosis). If erection quality has deteriorated, review [erectile dysfunction](/en/conditions/erectile-dysfunction). If the curvature has existed since adolescence rather than appearing later, [congenital penile curvature](/en/conditions/congenital-penile-curvature) may be the more relevant condition.

The question “Why did I get Peyronie’s disease?” is understandable.

The answer is usually not one event.

It is the interaction between mechanical stress, tissue susceptibility and abnormal scar healing.