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Peyronie’s (pay-roe-NEEZ) disease (PD) is the development of scar tissue (plaque) inside the penis which often causes symptoms like penis pain, a lump on the penis and a bent or curved penis, which can cause painful erections.  This condition can make it difficult to get or maintain an erection, often causing penis pain after sex.

Peyronie’s disease causes are generally unknown, though research suggests it often results from injury to the penis during sex.