<unk> , also known by several other terms, is a condition of the mucous membrane of the<unk> , usually on the dorsal surface. It is a common condition, affecting approximately 2–3% of the general population. It is characterized by areas of smooth, red depapillation (loss of lingual papillae) which migrate over time. The name comes from the map-like appearance of the<unk> , with the patches resembling the islands of an archipelago. The cause is unknown, but the condition is entirely benign (importantly, it does not represent oral cancer), and there is no curative treatment. Uncommonly,<unk>  may cause a burning sensation on the<unk> , for which various treatments have been described with little formal evidence of efficacy.
Geographic tongue
Mouth ulcer
Caviar tongue
Glossitis
Linitis plastica
Lichen planus
Fissured tongue
Oral candidiasis