10 Causes of White Tongue
Cause #5: Geographic Tongue
Geographic tongue refers to a tongue that has a map-like appearance often confused with thrush due to the presence of white patches. These patches can have an irregular whitish colored border and smooth red patches. The patches can move every few days. Some people find these patches to be sensitive or sore while others experience no symptoms.
Although it usually resolves itself after a while, patches that persist for more than two weeks should be reviewed by a doctor to rule out harmful issues. Patients should avoid foods that are spicy or salty if they cause discomfort until the patches resolve.
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