ED in men under 40 is often treated as unusual — by the men experiencing it, by their partners, and sometimes by their providers. It's not. Studies estimate that 8–25% of men under 40 experience ED, depending on how the condition is defined and measured. What is different is the likely cause — and therefore the appropriate workup.
The Distribution of Causes Under 40
In older men (60+), ED is predominantly vascular — the result of decades of atherosclerosis, hypertension, and endothelial damage. In younger men, the cause distribution shifts significantly:
- Psychogenic factors (40–60%): Performance anxiety, depression, relationship issues, pornography-related arousal patterns, and stress are the primary or contributing cause in the majority of young men with ED
- Medication-related (15–25%): SSRIs, finasteride, isotretinoin, and recreational drug use (MDMA, cocaine, opioids) are common in this age group
- Hormonal (5–15%): Hypogonadism from pituitary conditions, steroid use, or other endocrine disorders
- Vascular/organic (10–20%): Diabetes, early cardiovascular disease, venous leak, Peyronie's disease, or post-surgical/post-injury causes
The Workup That's Often Skipped
Many young men get handed a PDE5 inhibitor prescription without investigation into the underlying cause. While this solves the immediate problem, it misses potentially important diagnoses. A thorough young-man ED workup includes:
Sexual history in detail: Does ED occur with a partner but not during masturbation? (Suggests psychogenic.) Does it occur regardless of context? (Suggests organic.) Is desire present but erections absent? (Different from absent desire.) Is pornography use extensive? (A growing recognized factor in young men's ED.)
Mental health screening: Depression, anxiety, and stress are vastly more common causes of ED in young men than vascular disease. Screening with standardized tools (PHQ-9 for depression, GAD-7 for anxiety) should be routine.
Medication and substance review: Every medication and recreational substance should be reviewed. SSRIs cause sexual dysfunction in 30–70% of users. Finasteride has documented sexual side effects. Even isotretinoin (Accutane) has case reports of ED.
Hormonal panel: Total testosterone, free testosterone, LH, FSH, prolactin, thyroid function. Hypogonadism in young men is often secondary to pituitary disorders that require different treatment than age-related decline.
Metabolic screening: Fasting glucose, HbA1c, and lipid panel. Early type 2 diabetes is increasingly common in younger populations and can cause ED before other symptoms appear.
The Pornography Question
There is an ongoing clinical and research debate about whether extensive pornography use contributes to partnered ED in young men. The proposed mechanism is dopaminergic desensitization — chronic high-stimulation visual arousal may reduce responsiveness to real-world sexual stimulation.
The evidence is mixed: some case series and survey studies suggest an association, while controlled research is limited. Regardless of the debate, if a young man has no difficulty achieving erections during pornography use but cannot achieve them with a partner, a trial of pornography abstinence (30–90 days) is a reasonable, zero-risk intervention to try alongside any other treatment.
Don't Accept "You're Too Young for ED"
If a provider dismisses your ED because of your age, find a different provider. Young men deserve the same thorough evaluation as older men — and in many cases, the workup is even more important because the cause may be treatable, reversible, or a signal of an underlying condition that needs attention.