Cleft tongue: Horizontal cracks on the surface of the tongue, seen in Down’s disease (congenital stupidity) and riboflavin deficiency, the latter with tongue pain. About 0.5% of the healthy population has congenital fissures in the tongue, called congenital fissures, which are characterized by fissures covered with tongue moss and no discomfort. This congenital fissured tongue is different from the fissured tongue of a diseased person and is a normal tongue image. Cracked tongue is the main disease: (1) heat and Yin, mostly red-red tongue with cracks; (2) blood deficiency does not moisten, mostly pale white tongue with cracks; (3) spleen deficiency damp dip, mostly pale white tongue fat and tender, with teeth marks on the side and cracks. The treatment is to nourish Yin essence, benefit Qi and produce fluid; nourish the spleen and permeate dampness; nourish Yin and relieve fire; clear heat and moisten dryness. In addition, cracked tongue refers to the crack of the tongue texture and also the crack of the tongue moss; in the identification of evidence, the dryness and moistening of the moss should be used to identify. If the moss is cracked due to dryness, the external disease is heat-burning and injurious to the fluid, and the dryness and heat are serious. If the moss is cracked with fluid, it is mostly due to qi deficiency. 1, usually eat less fat, sweet and thick taste, keep the mood cheerful, so as to avoid heat in the spleen and stomach, fire and heat injury or seven feelings of depression. Fire and heat invasion and cause tongue cracking. 2, the chronic disease should be patient treatment, to avoid spleen temper injury. Liver and kidney yin deficiency, deficiency fire on inflammation. Loss of nutrients. Tongue fissures caused by the lack of essence. 3, tongue cleft patients should pay attention to oral hygiene, rinse the mouth after eating. Avoid fissures in the furrow to hide dirty things caused by congestion and edema inflammation. 4, tongue cleft patients, should be less into spicy, spicy, sour, sweet and other stimulating food, so as not to cause tongue tingling.