Erectile dysfunction (ED) refers to a man's inability to obtain and maintain an adequate erection for sexual activity. Most men occasionally experience ED, which is normal. However, ED is more common in older men, but can affect men at any age. When ED becomes a continuous problem, it can interfere with a man's psychological wellbeing as well as his and his partner's sex life.
It is also notable that ED may not be an isolated process. ED has also been found to be a harbinger of heart disease and some men with erectile dysfunction may benefit from seeing a heart doctor.