Thick white tongue coating belongs to white greasy moss, you can take food elimination medicine or removing dampness and phlegm formula, due to the difference in personal constitution, there is no medicine with the fastest effect. Normal human tongue coating should be thin white moss, i.e. a thin layer of white moss, while thick white tongue coating is abnormal, also known as white greasy moss. This kind of tongue coating suggests that there may be food accumulation (the accumulation of food in the stomach due to indigestion) or phlegm (the pathological products formed by the impaired metabolism of water and fluid), and different cases can be treated with antiphlogistic or phlegm removing medicines respectively. If the accumulation of food is caused by food stagnation, it can be treated with food-eliminating medicines, commonly used Chinese medicines are Shenqu, Shanzha, Maiba, and so on. If the phlegm is retained internally, accompanied by loose stools, drowsiness, heaviness, dullness (lack of appetite, reduced food intake), etc., it can be treated by removing dampness and resolving phlegm, and commonly used remedies are Er Chen Tang and Wen Bile Tang. It is recommended that people with thick white tongue coating should seek a traditional Chinese medicine practitioner for face-to-face diagnosis and identification, and should not take prescriptions arbitrarily.