Thick and yellow tongue coating indicates dampness and heat in the body from the aspect of Chinese medicine. According to Chinese medicine, yellow tongue coating is a manifestation of heat in the body, and thick coating indicates the accumulation of phlegm (a pathological product of impaired water metabolism) and dampness in the body. Combined with the different accompanying symptoms of the patient, it indicates that the internal organs where the dampness and heat are located are different. 1. Thick yellow tongue with dizziness, dystocia (pain in the area of the ribs), bitter taste in the mouth, fever, jaundice and other symptoms, is a manifestation of damp-heat in the liver and gallbladder (the accumulation of damp-heat in the liver and gallbladder). 2. Thick yellow tongue with sore throat, cough and yellow phlegm is a manifestation of lung fire and phlegm-heat. 3. Thick yellow tongue with symptoms such as frequent urination, urgency and pain in urination is a manifestation of damp-heat in the lower bladder. 4. Thick yellow tongue with nausea, vomiting, stomach distension, diarrhea, poor appetite and other symptoms, is a manifestation of gastrointestinal damp-heat. In addition, yellow tongue is also related to climate change and diet, for example, the summer weather is hot, dampness is heavy, eating greasy food, sweets and so on are also prone to yellow tongue. Once the patient has a yellow tongue, accompanied by other uncomfortable symptoms, should go to the Chinese medicine department, under the guidance of the physician standardized treatment, do not self-medication, so as not to cause unnecessary damage to the body.