White and thick tongue coating may be cold-dampness or damp-heat, and it is considered to be related to external cold-dampness or damp-heat evil, environment, dietary disorders, etc., which can be recognized with other symptoms. In Chinese medicine, symptoms can be diagnosed by observing changes in tongue coating, tongue color and tongue texture. Usually, white and thick tongue coating can be caused by either cold-dampness or dampness-heat, which needs to be judged according to the actual condition and symptoms. If it is cold-dampness, it is mostly considered to be caused by external cold and dampness, prolonged exposure to humidity, etc. The patient will also have symptoms such as fear of cold and cold limbs (fear of cold, cold limbs), abdominal pain and diarrhea, etc. If it is damp-heat, it is considered to be related to cold and dampness. If it is damp-heat, it is considered to be related to the external sensation of damp-heat evil, dietary disorders, the spleen and stomach are not healthy, emotionally and emotionally unhealthy reasons, in addition to the tongue coating white thick, the patient will also appear in the epigastric stuffiness and abdominal fullness, nausea and anorexia, urination yellow and short, bitter mouth and chest plumping and other symptoms. All in all, it is recommended that patients with white thick tongue go to the hospital and be treated by a doctor in order to avoid delaying their condition.