What is erectile dysfunction?

Erectile dysfunction (ED) is the inability of a man to achieve or maintain an erection. Most men experience this at some point in their lives, usually by age 40, and are psychologically affected by it. The term "erectile dysfunction" can mean the inability to achieve erection, an inconsistent ability to do so, or the ability to achieve only brief erections. According to the National Ambulatory Medical Care Survey (NAMCS), approximately 22 out of every 1000 men in the United States sought medical attention for ED in 1999.

What causes it?
There are many underlying physical and psychological causes of erectile dysfunction. Reduced blood flow to the penis and nerve damage are the most common physical causes. Underlying conditions associated with erectile dysfunction include the following:vascular disease, diabetes, drugs, hormone disorders, neurological conditions, pelvic trauma, surgery, radiation therapy, Peyronie's disease, venous leak, and psychological conditions.

Does it matter?
Some men, however, experience chronic, complete erectile dysfunction (impotence), and others, partial or brief erections. Frequent erectile dysfunction can cause emotional and relationship problems, and often leads to diminished self-esteem. Erectile dysfunction has many causes, most of which are treatable, and is not an inevitable consequence of aging.