Mouth ulcers are sores or open lesions in the mouth.
Oral ulcer; Stomatitis - ulcerative; Ulcer - mouth
Mouth ulcers are caused by many disorders. These include:
A skin sore caused by histoplasmosis may also appear as a mouth ulcer.
Symptoms will vary, based on the cause of the mouth ulcer. Symptoms may include:
Exams and Tests
Most of the time, a health care provider or dentist will look the ulcer and where it is in the mouth to make the diagnosis. You may need blood tests or a biopsy of the ulcer may be needed to confirm the cause.
The goal of treatment is to relieve symptoms.
The outcome varies depending on the cause of the ulcer. Many mouth ulcers are harmless and heal without treatment.
Some types of cancer may first appear as a mouth ulcer that does not heal.
Complications may include:
When to Contact a Medical Professional
Call your provider if:
To help prevent mouth ulcers and complications from them:
Daniels TE, Jordan RC. Diseases of the mouth and salivary glands. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 425.
Mirowski GW, Leblanc J, Mark LA. Oral disease and oral-cutaneous manifestations of gastrointestinal and liver disease. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 10th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 24.
Review Date: 1/26/2017
Reviewed By: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.