From the perspective of tongue diagnosis, exclude eating white food (milk, soy milk, etc.) caused by temporary white thick tongue coating, white thick tongue coating tongue fat with teeth marks are mostly considered for spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys) combined with cold and dampness of the evidence. White moss is usually the main evidence of surface and cold; thick moss mostly indicates that the disease is more prevalent and has been transmitted to the inside, or gastrointestinal stagnation, or phlegm-dampness; white, thick and greasy moss is mostly seen in cold-dampness evidence; tongue swelling, fat, resulting in the appearance of the tongue edge of the teeth marks is mainly suggestive of spleen and kidney yang deficiency. Spleen and kidney yang deficiency with cold and dampness evidence of clinical often see headache, body weight, chest tightness, asthma, diarrhea, limb and face edema, urinary incontinence (urine) and other symptoms. Tongue diagnosis is an important part of Chinese medicine diagnosis, through the tongue diagnosis can not only understand the body’s positive energy strength, viscera and internal organs, but also the diagnosis of certain diseases, the depth of the disease has a certain guiding significance. However, the diagnosis of the disease requires the four diagnostic methods (observation, listening, questioning and cutting), and cannot rely on tongue diagnosis alone to make a rash diagnosis.