Erectile dysfunction

Erectile dysfunction (ED) is the persistent difficulty getting or keeping an erection firm enough for satisfactory sex. "Persistent" is the key word. Clinical guidelines generally define ED as a problem lasting at least three months, because almost every man has an occasional erection that doesn't cooperate — after a bad night's sleep, too much alcohol, or a stressful week. That, on its own, is not ED. It becomes a condition worth investigating when it's the pattern rather than the exception.

It helps to think of ED as a symptom rather than a single disease. An erection depends on several systems working together at once: healthy blood vessels to carry blood into the penis, healthy nerves to trigger the response, the right hormonal balance, and a mental state that allows arousal to happen. If any one of these is disrupted, erections can become unreliable. This is why the European Association of Urology (EAU) and the American Urological Association (AUA) both recommend identifying the underlying cause before deciding on treatment, rather than treating ED as one uniform problem with one uniform fix.

This distinction matters practically. A man in his 20s whose ED appears only with a new partner, and not during masturbation or on waking, is describing a very different picture from a man in his 50s whose erections have gradually weakened across every situation. The first pattern points towards anxiety or psychological factors. The second points more towards a physical cause — often vascular. Most men, in practice, fall somewhere between the two: a physical issue is present, and worry about performance then makes it worse. This is called mixed ED, and it's the most common presentation seen in clinical practice.

There's a second reason ED deserves attention beyond the bedroom. The blood vessels supplying the penis are narrow, so they tend to show signs of atherosclerosis — the hardening and narrowing of arteries — earlier than the larger vessels supplying the heart. Because of this, new ED in a man with no obvious cause is sometimes described as an early warning sign, appearing before other symptoms of cardiovascular disease show up. This doesn't mean every case of ED signals heart disease. It means that when ED appears suddenly and without explanation, ruling out cardiovascular and metabolic causes is a reasonable first step, not an overreaction.

ED is also extremely common, and becomes more common with age — a pattern covered in more detail below. That commonality is worth sitting with for a moment: this is not a rare or shameful malfunction. It is one of the most frequently reported issues in men's health, and one with a wide range of well-evidenced treatment options, most of which don't involve surgery at all.

Diagnosis usually starts with a conversation, not a test. A doctor will typically ask how long the problem has lasted, whether it happens in all situations or only some, and about general health, medications, and mood. Many clinics use a short questionnaire, such as the International Index of Erectile Function (IIEF), to describe severity consistently.

A physical exam and blood tests — checking blood sugar, cholesterol, and testosterone — are common next steps, since ED is often linked to conditions like diabetes or heart disease that haven't yet been diagnosed. Further tests, such as a Doppler ultrasound to check blood flow or nocturnal erection monitoring, are used in specific cases rather than routinely.