An ulcer is a crater-like lesion on the skin or
Ulcers can be caused by inflammation or infection. Some ulcers may be caused by a cancer.
Review Date: 10/28/2010
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.