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Geographic tongue

Geographic tongue is a harmless condition affecting the surface of your tongue. The tongue is normally covered with tiny, pinkish-white bumps (papillae), which are actually short, fine, hair-like projections. With geographic tongue, patches on the surface of the tongue are missing papillae and appear as smooth, red "islands," often with slightly raised borders.

These patches (lesions) give the tongue a map-like, or geographic, appearance. The lesions often heal in one area and then move (migrate) to a different part of your tongue. Geographic tongue is also known as benign migratory glossitis.

Although geographic tongue may look alarming, it doesn't cause health problems and isn't associated with infection or cancer. Geographic tongue can sometimes cause tongue discomfort and increased sensitivity to certain substances.

Symptoms Causes Risk factors Complications

Signs and symptoms of geographic tongue may include:

  • Smooth, red, irregularly shaped patches (lesions) on the top or side of your tongue
  • Frequent changes in the location, size and shape of lesions
  • Discomfort, pain or burning sensation in some cases, most often related to eating hot, spicy, salty or acidic foods

Many people with geographic tongue have no symptoms.

Geographic tongue can persist for months or years. The problem often resolves on its own but may appear again at a later time.

When to see a doctor

Geographic tongue is a minor — although sometimes uncomfortable — condition. However, lesions on the tongue may indicate other more serious conditions of the tongue or diseases affecting the body in general. If you have lesions on the tongue that don't resolve within seven to 10 days, see your doctor or dentist.

The cause of geographic tongue is unknown, and there's no way to prevent the condition. There may be a link between geographic tongue and psoriasis — a chronic skin condition — but more research is needed to better understand the connection.

Studies of factors that may be associated with an increased risk of geographic tongue have produced mixed results.

Factors that are likely associated with an increased risk include:

  • Family history. Some people with geographic tongue have a family history of the disorder, so inherited genetic factors may increase risk.
  • Fissured tongue. People with geographic tongue often have another disorder called fissured tongue, the appearance of deep fissures, or grooves, on the surface of the tongue.

Geographic tongue is a benign condition. It doesn't pose a threat to your health, cause long-term complications or increase your risk of major health problems.

However, anxiety about the condition is fairly common because:

  • The appearance of the tongue may be embarrassing, depending on how visible the lesions are
  • It may be difficult to be reassured that there is, in fact, nothing seriously wrong
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