Traditional Chinese medicine believes that the tongue coating of heavy dampness is mainly characterized by white, thick and greasy tongue coating, with teeth marks on the side. If the dampness is heavy and accompanied by heat, then the dampness and heat are wrestling with each other, and the tongue coating can also be manifested as yellow and greasy tongue coating. Tongue moss is a layer of moss attached to the human tongue, Chinese medicine believes that the tongue moss is caused by the stomach qi on the steam, can reflect the positive qi strength and weakness, the depth of the evil and so on. Dampness heavy patients in the tongue is mainly manifested in the tongue moss white and thick greasy, tongue body fat, the edge of the teeth marks, and so on. If the dampness is stored for a long time, and the heat is transformed into heat, the dampness and heat will fight with each other, and the tongue coating can also show yellow and thick and greasy situation. Dampness heavy patients, it is recommended to go to a regular hospital, under the guidance of a professional physician to identify the treatment.