Oral ulcer; Stomatitis - ulcerative; Ulcer - mouth
Mouth ulcers are sores or open lesions in the mouth.
Symptoms will vary, based on the cause of the mouth ulcer. Symptoms may include:
- Open sores in the mouth
- Pain or discomfort in the mouth
Exams and Tests
Most of the time, a health care provider or dentist will look at 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 underlying cause of the ulcer should be treated if it is known.
- Gently cleaning your mouth and teeth may help relieve your symptoms.
- Medicines that you rub directly on the ulcer. These include antihistamines, antacids, and corticosteroids that may help soothe discomfort.
- Avoid hot or spicy foods until the ulcer is healed.
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.
When to Contact a Medical Professional
Contact your provider if:
- A mouth ulcer does not go away after 3 weeks.
- You have mouth ulcers return often, or if new symptoms develop.
To help prevent mouth ulcers and complications from them:
- Brush your teeth at least twice a day and floss once a day.
- Get regular dental cleanings and checkups.
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Pham KL, Mirowski GW. Oral disease and oral-cutaneous manifestations of gastrointestinal and liver disease. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger & Fordtran's Gastrointestinal and Liver Disease. 11th ed. Philadelphia, PA: Elsevier; 2021:chap 24.
Last reviewed on: 2/2/2023
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.