Map tongue, also known as wandering tongue, is a non-infectious inflammatory condition of the tongue. It is more common in children. It is more common in women than in men. The cause of the tongue is not known and it may disappear on its own with age. The possible reasons for the occurrence of map tongue are as follows. 1, genetic factors: some hereditary diseases have the appearance of map tongue, so map tongue may be related to genetics. 2, immune factors: some allergic people will appear map tongue, so map tongue may also be related to immune factors. 3, mental factors: map tongue patients often have mental tension factors. Sometimes the psychological pressure is relatively high, there will be insomnia. 4, other factors: map tongue factors may also be nutritional problems, such as lack of vitamin B, and oral local factors, such as dental caries. Generally have a map tongue, can not be treated, can also be applied locally some mouthwash or spray to prevent infection. It is very necessary to prevent map tongue. To regulate emotions, try to relax, treat systemic diseases and oral diseases, maintain good oral hygiene, strengthen nutrition, and avoid eating foods that cause allergies.