Erectile dysfunction (ED), also known as impotence, is the inability to achieve and maintain an erection firm enough for sexual intercourse. Occasional erection problems aren't uncommon and usually aren't cause for concern. However, persistent erectile dysfunction can lead to stress, affect self-confidence, and cause relationship problems. It can also be a sign of an underlying health condition requiring treatment and may be a risk factor for heart disease.

Symptoms of Erectile Dysfunction:
Trouble getting an erection.
Trouble keeping an erection.
Reduced sexual desire

Common Causes of Erectile Dysfunction:
Psychological disorders such as stress and anxiety
Low testosterone levels
Neuropathy (nerve damage)
Vascular disorders, including atherosclerosis (hardening of the arteries)
Certain medications
Obesity
Alcoholism
Injury to the penis
Development of scar tissue inside the penis