Erectile dysfunction as an early warning: blood flow, not hormones
October 6, 2026 · 16 min read
Urologists Michael Eisenberg and Rena Malik say most erectile problems come from blood vessels and the pelvic floor and often appear before heart disease does, and Kelly Starrett and Kyle Gillett add the movement and lifestyle side. Men who treat it as a health signal get a chance to fix the cause early.
The rules, numbers and steps worth keeping in front of you.
- Eisenberg and Malik: hormones cause only about 3 to 10 percent of erectile dysfunction. Blood flow is the usual cause.
- Eisenberg: penile arteries are about one millimeter wide, so they can show vascular disease before the heart does.
- Malik: about 15 percent of men who develop erectile dysfunction have a cardiovascular event within seven years.
- Eisenberg: get screened for blood pressure, lipids and fasting glucose, even if a pill fixes the symptom.
- Malik and Gillett: erections during sleep suggest the organ works and the cause is situational, anxious or muscular.
- Malik: in men in their 20s and 30s, look at pelvic floor tension, sitting and anxiety.
- All of them: do not start Kegels on your own. Many men need to relax the pelvic floor, not strengthen it.
- Malik and Gillett: nicotine, smoked or vaped, constricts blood vessels.
- Malik: an hour of exercise does not offset a day of sitting.
- Eisenberg: PDE5 inhibitors help 60 to 70 percent of men, and further options exist if they fail.
- Cyclists with numbness: stand up regularly, get a professional fit, or try a wider or noseless seat.
- Gillett: for young men with normal testosterone, therapy's harm almost always outweighs the benefit.
- Emergency: an erection lasting more than four hours without arousal needs an emergency room.
This is the short form. The full insight has every expert's reasoning, their own words and the sources.