Flaking tongue may be caused by genetic factors, nutritional factors, immune factors, psychological factors, poor oral hygiene and other reasons. 1. Flaking tongue is hereditary in the family and may be caused by the role of genes. 2. Patients with a large lack of vitamin B or trace elements such as zinc and iron will have a peeling tongue, and should be supplemented in time. 3. Patients with low immunity are prone to tongue flaking, especially those with allergies, and are advised to improve their immunity. 4. People who are mentally stressed, overworked or emotionally unstable may have changes such as peeling of the tongue mucosa, and it is recommended to consult a psychiatrist. 5. Symptoms may also occur in people with poor oral hygiene and frequent consumption of irritating foods.