Map tongue, also called wandering tongue, is caused by the exfoliation of filiform papillae on the surface of the shed. Map tongue has more causes, mostly related to the weakness of children, and the lack of nutrition, poor digestive function, etc.; map tongue is also related to oral hygiene, when there are more dental caries, can also aggravate the map tongue. If there are obvious symptoms that affect eating, you can go to the hospital to prescribe some mouthwash, or local medicine to reduce the symptoms, there is no obvious symptoms, generally do not need to treat, and will gradually disappear when you are older. If children are found to have caries in the mouth, they can be treated in time. Babies should clean their mouth every day after they are born, and they should scrub with gauze dipped in water as soon as their teeth erupt, or their mothers should wear fingertip toothbrush to help their children brush their teeth, oral cleaning can reduce the condition of map tongue.