Peyronie's disease (PD) is a benign, acquired penile connective tissue disease characterized by the occurrence of fibrotic plaques within the tunica albuginea — the dense elastic covering of the corpora cavernosa. Learn about Peyronie’s disease, the causes, how it develops, the risk factors, diagnosis, and treatment options, and clinical trials. Peyronie's disease occurs when a buildup of scar tissue causes curved and often painful erections. Learn the symptoms, causes, and treatment options. Peyronie's disease is a condition that causes your penis to curve when it's erect. It can be painful but there are treatments to ease the symptoms and stop it getting worse. Peyronie's (pay-roe-NEEZ) disease is a condition in which fibrous scar tissue forms in the deeper tissues under the skin of the penis. This causes curved, painful erections. It also can make the penis shorter while erect. Peyronie's disease is not caused by cancer. Penises vary in shape and size. Peyronie’s disease occurs when scar tissue forms in the elastic sheath of the penis that helps maintain rigidity during an erection. As scar tissue builds up, it can cause the penis to bend, curve, shorten, or narrow when erect. If you have Peyronie's disease symptoms, you're likely to start by seeing your family doctor or general practitioner. You might be referred to a specialist in male sexual disorders called a urologist. Peyronie’s disease is a condition in which scar tissue causes your penis to curve or lose length or girth. In some cases, it can cause pain and make it difficult or impossible for you to have sex. Peyronie's disease (PD) is an acquired, localized fibrotic disorder of the tunica albuginea, resulting in penile deformity; mass; pain; and, in some men, erectile dysfunction. Peyronie's disease is a condition in which scar tissue in the penis causes the penis to bend. WebMD looks at its causes, symptoms, and treatment.