An ulcer is a crater-like sore on the skin or mucous membrane. Ulcers form when the top layers of skin or tissue have been removed. They can occur in the mouth, stomach, and other parts of the body.
Ulcers can be caused by inflammation, trauma, or infection. Some ulcers may be caused by a cancer.
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James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM. Disorders of the mucous membranes. In: James WD, Elston DM, Treat JR, Rosenbach, MA, Neuhaus IM, eds. Andrews' Diseases of the Skin: Clinical Dermatology. 13th ed. Philadelphia, PA: Elsevier; 2020:chap 34.BACK TO TOP
Review Date: 10/20/2022
Reviewed By: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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