What causes erectile disfunction?

Many causes: Many thing can cause ed including high blood pressure, diabetes high cholesterol, medication including drugs of abuse, low hormones, kidney problems, liver problems. Basically, ed is something that you need to bring up with your doctor because it is not normal and it needs to be investigated further because there could be something wrong that with your body that needs treatment.

Erectile dysfunction: Ed is currently believed to have more of a physical cause rather than psychological in men 40yrs old or more. Arterial diseases (arteriovenous insufficiency) is the main cause due to plaque build up in the small penile arteries as well as hardening of arteries. It is associated with conditions like diabetes, high blood pressure, hormonal problems. But never ignore psych issues esp in young men.

Many causes: From things that affect the nerves like diabetes, things that affect the blood vessels like heart disease, hypertension, smoking, and other things too like medications, trauma, anxiety/stress/mood issues ...