When you become sexually aroused, blood flows into spongelike spaces inside your penis, expanding and stiffening it. A bent penis generally occurs when these spaces don't expand evenly. Most often, this is due to normal differences in penis anatomy, but sometimes scar tissue or another problem causes a bent penis and painful erections.
Possible underlying causes of a bent penis include:
- Peyronie's disease (a curved erection caused by one of a number of underlying conditions)
- Injury to the penis
- Autoimmune disorders
- Inherited fibrous tissue (collagen) abnormality
July 14, 2020
Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.
- Brant WO, et al. Peyronie's disease: Diagnosis and medical management. http://www.uptodate.com/home. Accessed March 28, 2017.
- What is Peyronie's disease? Urology Care Foundation. http://www.urologyhealth.org/urologic-conditions/peyronies-disease. Accessed March 28, 2017.
- AskMayoExpert. Peyronie disease (adult). Mayo Clinic; 2019.
- Penile curvature (Peyronie's disease). National Kidney and Urologic Diseases Information Clearinghouse. https://www.niddk.nih.gov/health-information/urologic-diseases/penile-curvature-peyronies-disease. Accessed March 28, 2017.
- Castle EP (expert opinion). Mayo Clinic, Rochester, Minn. March 29, 2017.