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Geographic tongue is irregular patches on the surface of the tongue. This gives it a map-like appearance.
Patches on the tongue; Tongue - patchy; Benign migratory glossitis; Glossitis - benign migratory
The exact cause of geographic tongue is unknown. It may be caused by a lack of vitamin B. It also may be due to irritation from hot or spicy foods, or alcohol. The condition appears to be less common in smokers.
The change in pattern on the surface of the tongue occurs when there is a loss of the tiny, finger-like projections, called papillae, on the tongue. These areas look flat as a result. The appearance of the tongue may change very quickly. The flat-looking areas may remain for more than a month.
Your doctor will diagnose this condition by looking at your tongue. Most of the time, tests are not needed.
No treatment is needed. Antihistamine gel or steroid mouth rinses may help ease discomfort.
Geographic tongue is a harmless condition. It may be uncomfortable and last for a long time.
Call your doctor if the symptoms last longer than 10 days. Seek immediate medical help if:
Avoid irritating your tongue with hot or spicy food or alcohol if you are prone to this condition.
Reamy BV, Derby R, Bunt CW. Common tongue conditions in primary care. Am Fam Physician. 2010;81(5):627-634.
Mirowski GW, Mark LA. 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. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 22.