Diseases and Conditions
Pyoderma gangrenosum
Overview
Symptoms
Causes
Risk factors
Complications
Prevention
Diagnosis
Treatment
Coping and support
Preparing for an appointment
Causes
The exact cause of pyoderma gangrenosum is unknown. The condition is not infectious or contagious. It's often associated with autoimmune diseases such as ulcerative colitis, Crohn's disease and arthritis. And it may have a genetic component.
If you have pyoderma gangrenosum, new skin trauma, such as a cut or puncture wound, may trigger new ulcers.