What Causes Erectile Dysfunction in Young Men?

ED is not only a problem of age. Research on younger men points to a mix of anxiety, smoking, drug use and, less often, hormonal or vascular disease.

Erectile dysfunction in young men usually has more than one cause, and it is more common than most people expect. A 2017 review estimated that large multinational studies put prevalence in young men as high as 30%, and sorted causes into psychological (depression, anxiety, partner-related difficulties) and physical (blood vessel, hormonal, nerve, medicine-related and structural).¹ This article covers what the clinic data show, how the causes differ, and what an evaluation checks.

How common is ED in men under 40?

Figures vary with how ED is defined and who is surveyed, so treat any single number with care. The 2017 review cites large multinational studies reporting prevalence as high as 30% in young men, and concludes that ED in young men is increasingly common.¹

A clinic-based series is more concrete. In 439 consecutive men at an Italian urology center who sought first medical help for new ED as their main sexual problem, 114 (26%) were 40 or younger (mean age 32.4 years).² The younger men differed from the older group in several ways:

The authors called the analysis exploratory. It describes men who came to one specialist center, not all young men, and it cannot say how many young men have ED and never seek help.²

What are the psychological causes?

The NIH says anxiety, depression, stress, loneliness, low self-esteem and negative body image can either cause ED or make it worse.³ The 2017 review describes the typical psychogenic picture as sudden onset, reduced desire in some men, and good-quality erections when alone or on waking.¹

Performance anxiety is the best-known example. A 2020 review estimated it affects 9% to 25% of men and can sustain erection trouble through worry about the next attempt.⁶ For how medication fits that pattern, see our review of medication for performance anxiety ED.

What are the physical causes?

Physical ED is less common in the young, but the NIH list is the same one clinicians use at any age.³

• Diabetes and other chronic disease. Diabetes, kidney disease, obesity and lung disease are named. See how diabetes relates to ED.
• Heart and blood vessel disease. Atherosclerosis, high blood pressure and stroke are listed. See ED and heart health.
• Hormones. Low testosterone and thyroid imbalance.
• Nerves. Multiple sclerosis, spinal cord injury and damage from pelvic surgery.
• Penis and prostate conditions. Enlarged prostate and Peyronie's disease.

The 2017 review notes that organic ED tends to start gradually, with low to normal desire.¹ In the Italian series younger men had higher testosterone than older men, so hormone problems were not the typical explanation.²

Do medicines, smoking, alcohol and drugs play a role?

Yes. The NIH says ED can be a side effect of many common medicines, including antidepressants, blood pressure pills and water pills, antihistamines, some pain relievers and sedatives, and lists too little physical activity, heavy drinking, smoking and recreational or illicit drugs as lifestyle contributors.³ For the blood pressure link, see blood pressure medicines and ED.

Cannabis is a studied example. In 64 men with ED lasting at least three months, cannabis smoking was reported by 78% of men with organic (vascular) ED and 3% of those with non-organic ED, and the vascular group showed impaired blood vessel widening. The authors proposed early endothelial damage, but this was a small observational study, so it cannot show that cannabis caused the ED.⁴

Why can ED in a young man come and go?

Erections respond to mood, sleep, alcohol and stress, so one bad night does not mean a disorder. The placebo data show how variable it can be. In an analysis of 42 sildenafil trials, 13.5% of 4,360 men given placebo reached a normal erectile function score at the last visit, with the highest odds in men younger than 45 and in men with mild ED. The analysis was retrospective and included Pfizer authors.⁵

That does not mean the problem is imaginary. It means mild, recent ED in a younger man often fluctuates, and a good evaluation separates a passing pattern from one that signals a health condition.

What does an evaluation look for?

The 2017 review calls for a careful diagnostic evaluation aimed at finding the underlying cause before treatment is chosen.¹ In practice, that means a history of how it started, whether morning erections occur, medicines and substance use, mood and relationship factors, and a check of blood pressure, blood sugar and often testosterone. Because ED can be an early sign of diabetes or vascular disease, a young man with persistent ED should not skip this step.³

Treatment follows the cause. The review describes PDE5 inhibitors as the mainstay for most men, alongside counseling where anxiety or relationship factors are involved.¹ Prescription medicines carry label restrictions, so the choice belongs with a clinician. Our guide to ED medication interactions explains the main ones.

Bottom line

ED under 40 is common enough that one in four new ED patients in one clinic series was in that age group, and the causes lean toward anxiety, smoking and drug use more than chronic disease. A persistent problem still deserves a medical check, because the same symptom can be the first sign of diabetes, a hormone problem or a vascular condition.

Questions readers ask

What causes erectile dysfunction in young men?

A 2017 review sorts causes into psychogenic (depression, anxiety, partner-related difficulties) and organic (vascular, hormonal, nerve, medicine-related and structural). The NIH also lists smoking, alcohol, recreational drugs, obesity, diabetes and some prescription medicines. Often more than one factor is involved.

Is it normal for a young man to have ED?

It is more common than most people assume. In one Italian clinic series, 26% of men seeking first help for new ED were 40 or younger. Occasional erection trouble is common; ED that keeps happening is worth a medical check.

Is ED in young men usually psychological?

Not always. The 2017 review describes psychogenic ED as tending to start suddenly with good spontaneous erections, and organic ED as gradual with low to normal desire. Many men have a mix, and only an evaluation can tell them apart.

Can smoking or cannabis cause ED in young men?

The NIH lists smoking and recreational drugs as lifestyle contributors. A small study found cannabis use far more common in young men with vascular ED, but it was observational, so it shows an association and not proof.

Should a young man with ED see a doctor?

Yes if it persists. The 2017 review recommends a careful diagnostic evaluation to find an underlying cause, because ED can accompany diabetes, hormone problems or heart and blood vessel disease.

Further reading

Part of our guide: ED and Your Health: The Heart, Blood Pressure, Diabetes and Age

• Is ED Related to Diabetes? What the Research Shows
• ED and Blood Pressure Meds: Which Ones, If Any, Affect Erections?
• ED and Heart Health: Why Erectile Dysfunction Can Be an Early Warning
• Sildenafil Headache: How Common Is It?