Thick, white and rough tongue coating may be caused by phlegm, dampness and heat, accompanied by fluid depletion in Chinese medicine. In traditional Chinese medicine, the thickness of the tongue coating mainly reacts to the depth of the evil in the body to stay in the part of the thick moss, thick moss indicates that the evil attack on the human body has been in the deeper parts, or phlegm and dampness in the body, food stays in the stomach and intestines. Roughness of the tongue moss reacts to dampness and heat staying in the body and is accompanied by depletion of fluid. White moss generally shows that there is dampness in the body, and under special circumstances, it also indicates that there is heat in the body. Therefore, thick white rough tongue coating suggests that the evil of dampness and heat in the body pervades all parts of the body and is accompanied by the depletion of fluids. Tongue thick white roughness, also need to be combined with the symptoms and pulse and other comprehensive analysis and judgment, such as the body of other symptoms, need to consult a doctor as soon as possible, clear cause of the disease, under the guidance of the physician standardized treatment, do not blindly use their own medication, so as not to cause adverse reactions.