Cracked tongue may be related to congenital tongue fissure, malnutrition, dehydration and other factors, asymptomatic can be temporarily observed, symptoms can be symptomatic medication, with diet and nutrition, hydration and other ways to improve. 1. Congenital tongue fissure: When tongue fissure is caused by congenital tongue fissure, it is mostly caused by heredity. If there is no obvious discomfort in the tongue, you can observe it and leave it for the time being, and you can brush your tongue with a soft-bristled toothbrush; if there is pain in the tongue, you can use drugs such as lidocaine to relieve the pain. The specific use of drugs need to be guided by the doctor. 2. Malnutrition: Cracked tongue may be related to malnutrition, the body lacks riboflavin, niacin, B vitamins, it is recommended to eat more food rich in B vitamins, riboflavin, niacin and other nutrients, pay attention to diet and nutritional balance, do not picky, do not favor food. 3. Lack of water: Cracked tongue may be a serious lack of water in the body, the rapid loss of water on the surface of the tongue caused by this time to timely replenish water. Cracked tongue can first try to improve themselves, such as cracked tongue and bring discomfort symptoms, can go to the regular hospital in time.