The main symptoms of Spleen and Stomach Yin Deficiency (insufficient Yin fluid in the Spleen and Stomach) syndrome are dry mouth and throat, abdominal distension, dry and knotty stools, and red tongue with little fluid. The common symptoms of fissured tongue are the appearance of different forms of fissures on the dorsal surface of the tongue, with fissures varying in size, number, shape and depth. Yin deficiency of the spleen and stomach refers to deficiency of yin and fluid, loss of moisturizing of the spleen and stomach, with clinical manifestations such as dry mouth and lips, inappetence for food and drink, dry and knotty stools, tiredness and fatigue of limbs, thinness of body, red tongue with little fluid, and so on. Cracked tongue is a tongue disorder in which irregular or regular grooves are seen on the tongue, with common symptoms of different forms of fissures on the dorsal surface of the tongue, cracks of different sizes, numbers, forms and depths, mostly caused by qi and yin deficiencies (deficiency in qi and yin fluids), congenital insufficiency of endowment (inborn poor physique and functioning), blood deficiency, yin deficiency, and so on. Patients are advised to go to the hospital for timely consultation when discomfort occurs, and under the identification and analysis of a professional Chinese medicine practitioner, targeted treatment will be carried out.