M.D. A fairly common affliction in men is Peyronie's disease, in which the penis bends up, down or to one side during an erection. Men who have had a tube inserted in the bladder by a doctor are 16 times more likely to suffer Peyronie's disease. Those who had genital trauma are three times as likely.
Men have balloon-like blood vessels in their penis that fill with blood when they have erections.
Scars cannot expand as much as balloons do, so the erected penis bends toward the side with the scar. Men with Peyronie's disease are usually told to live with it unless the erection becomes painful or the bend is so great that the man cannot engage in sexual relations. Then the usual treatment is to cut out the scar and replace it with a graft. Needless to say, this procedure doesn't always work. A case-control study on risk factors for Peyronie's disease.