How to cure geographic tongue?

Can't: There is no cure for geographic tongue. Most cases of geographic tongue (aka erythema migrans, and benign migratory glossitis) do not have any symptoms so it's not treated at all. Occasionally you will see a patient who has a burning sensation in which case the dentist can prescribe topical anti-inflammatory agents.

Geographic tongue: Geographic tongue has many other names including benigh migratory glossitis and is a disorder that is more of a nuisance than anything else. There is no known cure but symptoms may be managed. Consult your dentist.