Thick, white, yellow tongue coating and dry, bitter mouth may be due to damp-heat in the liver and gallbladder (damp-heat evils accumulating in the liver and gallbladder), but the exact cause needs to be determined in conjunction with the patient’s other symptoms. Patients with damp-heat of the liver and gallbladder may not only have the symptoms of a thick, white, yellow tongue coating and dry mouth and bitterness, but also have yellow eyes and body, distension and pain in the ribs and flanks, or lumps (lumps) under the flanks, dullness (lack of appetite, reduced food intake), aversion to oil and greasy food, vomiting (nausea and wanting to vomit), abdominal distension, bowel irregularities (stool abnormalities), and short, reddish urination (small amount of urination, dark yellow in color). Liver and gallbladder dampness and heat of the patient, the diet should be light, low-fat, easy to digest, nutritious, should be a small number of meals, avoid eating fatty, pungent and irritating food, prohibit the consumption of alcohol, avoid overeating. If the tongue coating thick white yellow dry mouth bitter symptoms for a long time without relief or accompanied by other discomfort, timely medical care, identify the causes, targeted treatment.