In a nutshell
Smooth red areas with pale borders can appear on the tongue, changing shape and location. Geographic tongue is benign and not contagious, but acidic or spicy foods can cause burning.
Why does it happen?
Surface papillae are reduced in the red areas. While one site recovers, new changes can appear elsewhere. Why this inflammatory pattern occurs is not fully understood.
Frequency
Geographic tongue affects some people. Frequency estimates vary by group studied and timing because the visible changes can come and go.
Frequency is a qualitative description, not your individual probability.
Is it normal?
Usually harmless and causes few symptoms.
When to seek advice
Have new, unexplained tongue changes assessed by a dentist; a persistent sore, lump, bleeding, or ongoing pain should be examined.
Does this happen to you?
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Sources (1)
- Landkartenzunge: Ursachen, Symptome und Behandlung (opens a new tab)
The overview describes migrating smooth areas, loss of papillae, and the benign course.
Editorial update: . AI-assisted research and editing; not individually reviewed by a physician. How we research
