Overview
Geographic tongue is a common, benign condition where smooth red patches with pale borders appear on the tongue's surface, looking a little like a map. The patches change shape and position over days to weeks — one area heals while another appears — which is the giveaway that distinguishes it from things that stay put.
It is not an infection, not contagious, and not linked to cancer. Most people have no symptoms; some notice stinging with acidic, spicy or salty foods while a patch is active. The cause is not fully understood, though it runs in families and can flare with stress; it is also more common in people with psoriasis.
No treatment is needed beyond reassurance and avoiding trigger foods during flares. The rule that always applies: a tongue patch that does not move or heal within two weeks is a different problem and should be examined.
What to know
- Harmless and common — a look, not a disease
- Patches migrate: the pattern this week differs from last week
- Can sting with spicy, acidic or salty food during flares
- No treatment needed; triggers can be avoided during flares
- Any fixed patch lasting more than two weeks needs examination
Common questions
Is geographic tongue caused by a vitamin deficiency?
Why does my tongue sting with certain foods?
Could it be oral thrush instead?
How do I know it isn't something serious?
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