Peyronie's Disease is characterized by an extreme curving of the erect penis caused by a hard, fibrous layer of scar tissue (plaque) that has developed under the skin. When the penis grows and hardens, the scar tissue pulls the affected area to an angle, causing an unnatural bend. The plaque that is formed by the thickened layers of penile soft tissue is non-cancerous, but this condition can be painful and make sexual intercourse quite difficult. There are a number of factors that can cause Peyronie's Disease. An injury to the penis caused by vigorous masturbation from a long time or aggressive sexual intercourse or from an accident may cause small tears in the tissue and ruptured blood vessels that bleed internally. Other cause includes weak or poor development of penis due to nutritional deficit and certain medications for Hypertension, diabetes, epilepsy etc.