Tongue mouth ulcers may be caused by tongue trauma, lack of nutrition, mental factors and endocrine changes. 1. Tongue trauma: If you accidentally bite your tongue or rub your tongue with sharp teeth for a long time when eating food, it can cause traumatic tongue mouth ulcers. 2. Lack of nutrition: If you are usually picky about what you eat or go on excessive diets, it can cause malnutrition, leading to a lack of trace elements in the body, such as zinc, iron, vitamin B12 and vitamin C, which can lower the immune function and lead to the occurrence of tongue mouth ulcers. 3. Mental factors: usually associated with autonomic dysfunction, such as mental overstress, depression, irritability, etc., will lead to the occurrence of oral ulcers of the tongue symptoms. 4. Endocrine changes: If the patient is a woman, the tongue and mouth ulcers may be related to the decline in the amount of estrogen in the body, and after the end of menstruation will gradually improve. It is recommended that when the symptoms of tongue and mouth ulcers appear, you should go to the hospital in time to do the relevant examination, to clarify the cause of the disease under the guidance of the doctor reasonable treatment.