Thick and white tongue coating can be caused by accumulation of food and phlegm (pathological products formed by water and liquid metabolism disorder), plague and carbuncle, dry heat and injury to fluids, etc., which can be adjusted by traditional Chinese medicine. 1. Accumulation of food and phlegm: the tongue coating is mostly white and thick and greasy, and there are also symptoms of fatigue (mental exhaustion and physical weakness), chest tightness and epigastric congestion, nausea and vomiting, abdominal distension and diarrhea, etc. The treatment should strengthen the spleen, dispel phlegm, and promote the development of the spleen. Treatment should strengthen the spleen, dispel phlegm, eliminate food and stagnation, commonly used prescriptions are spleen-healthy pill, Hovenia pinnata anti-plankton pill, Hovenia conduit stagnation pill, commonly used traditional Chinese medicines are Poria cocos, Atractylodes macrocephala, Chen Pi, Hovenia cumini, Sand nut, thick Park and so on. 2. plague carbuncle: tongue coating thick white like accumulating powder, touching not dry, symptoms are similar to modern infectious diseases, commonly used prescription has clear plague and poisonous drink, pu ji disinfectant drink, angong niu huang pill, etc., commonly used traditional Chinese medicine has gypsum, buffalo horn, gardenia, yellow dock, forsythia, panax quinquefolium, etc.. 3. dry heat injury: tongue coating white thick and dry crack, rough as gravel, at the same time there are symptoms such as heartburn and thirst, dry mouth, dry stools, etc., commonly used formulas such as bamboo leaf gypsum soup, white tiger plus ginseng soup, thirst formula, etc., commonly used light bamboo leaves, gypsum, tai zi ginseng, raw rhizome, etc.. Tongue coating can only partially reflect the body’s condition, it is not recommended to use it as the only basis for disease diagnosis, if you feel unwell, it is recommended to consult a doctor in time.