About a year: Geographic tongue is harmless. It isn't linked to any infection or medical condition. It affects 1 - 3% of people. It tends to affect middle aged or older adults more often. It tends to run in families. If there are symptoms, avoid tobacco, spicy, acidic foods, salty foods, toothpaste with additives such as whiteners. Some people say it will last a year others say it will disappear over time.
Answered 6/6/2016
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