Cleft tongue: cracks with different sizes, depths and shapes appear on the tongue surface, which is called cleft tongue. Main diseases and related research: tongue fissure is mostly yin deficiency and heat excess syndrome. The main symptoms of cracked tongue are: (65,438+0) excessive heat impairs yin, mostly with red tongue and cracked tongue; (2) Blood deficiency is not moist, mostly pale and cracked tongue; (3) Spleen deficiency, wet immersion, pale tongue, fat and tender, with teeth marks and cracks at the edge. Treatment should nourish yin essence, replenish qi and promote fluid production; Strengthening the spleen and infiltrating dampness; Nourishing yin and purging fire; Clearing heat and moistening dryness. In addition, tongue crack refers to the crack of tongue quality and also refers to the crack of tongue coating; Dialectically speaking, it should be distinguished from the dryness and wetness of the moss. If it is chapped due to dryness, it is exogenous disease, heat burning and body fluid injury, and severe dryness and heat. If there is liquid on the fur and it cracks, it is mostly caused by qi deficiency. According to modern research, superficial supralingual fissure is mainly due to the atrophy of tongue mucosa, which makes the longitudinal or horizontal lines of the tongue protrude from the surface, while deep supralingual fissure is a serious atrophic lesion of the tongue, which makes the epithelial layer of the tongue lose its normal structure, some nipples flatten and fuse, some atrophy and fracture to form cracks, and there is a phenomenon of thickening scar contraction under it. The Guide to Tongue Diagnosis: A Textbook for Tongue Diagnosis holds that a flat tongue has no lines, but lines lead to blood failure, and the depth of cracks rarely reflects blood failure. —— Transverse fissure of tongue is caused by deficiency of element yin, such as borneol, which is mostly caused by deficiency of yin in the elderly; -the tongue is crimson without coating or short with horizontal straight lines, which is yin deficiency and dryness; -A cracked tongue, such as herringbone and Sichuan characters, belongs to dryness of gastric juice, which is forced by excess heat. -red tongue with a character pattern indicates that evil has just entered the heart, or cold medicine has been misused due to yin syndrome; -the tongue is red and cracked, and thirst leads the drinker to disappear; -the red and red fur is thick and cracked, which is the excess heat of the viscera; -no moss, no spots, and red cracks, which are yin deficiency and fire; -dry tongue, caused by pathogenic heat entering the liver or vaginal fluid; -but the rupture is not only due to insufficient stomach yin and stagnation of phlegm and heat; -If the tongue coating is crimson, the tip of the tongue is broken, and there is blood stains and pain, it is a large loss of vaginal fluid and a burning heart; -yellow tongue with tiger stripes. Tonifying both qi and blood; -The tongue is ruddy with black lines, which is Yang Jue's cold syndrome; -those who see herringbone patterns on the lower back are kidney qi; -those with lines on the stomach are mostly due to insufficient stomach qi; -The tongue is pale and white, covered with hairlines, with spleen deficiency and dampness, red tongue with several black lines, and slippery fur is cold syndrome of water riding fire; -the tongue is blue and purple, which is a decline in stomach qi due to typhoid fever and cold stagnation of miscellaneous diseases; -laceration bleeding, burning bleeding on the tip of the tongue, which is caused by the thermal plasticity of the heart meridian. -Because there are many cleft tongue syndrome, it is rare in clinical diseases. For details, please refer to each card. Patients with this tongue picture are generally complicated, and the treatment should be based on syndrome differentiation.