Erectile dysfunction (ED) is a fairly common condition affecting men worldwide. Though the term ED covers a wide range of disorders, it commonly refers to having trouble getting or maintaining an erection. ED is not uncommon and its incidence increases with progressive age. It was formerly called impotence and its incidence increases in ages above 65.

Persistent ED has a significant impact on the man's self-image as well as on his partner's sex life. Indeed for many men & their partners, this can be a frustrating problem as the penis is unable to become sufficiently rigid and performing intercourse may seem impossible.

Though once considered a taboo, more men are now seeking information regarding ED as well as volunteering to share valuable information about it. Current estimates state that Chronic ED affects about 5% of men in their 40s and 15-25% of men by the age of 65. Transient ED and inadequate erection affect as many as 50% of men between the ages of 40 and 70.

To understand ED, it is essential to understand the normal process of achieving an erection. The anatomy of the penis is worth understanding in this aspect.

The penis contains two chambers full of spongy tissue called the corpora cavernosa. When a man becomes sexually aroused impulses from the brain and local nerves cause muscles in the corpora cavernosa to relax, allowing blood to flow in and fill the spaces within the tissue.

This creates pressure in the corpora cavernosa, making the penis expand.