Halitosis, according to Chinese medicine, is mostly caused by internal dampness and heat, intestinal and gastrointestinal accumulation of heat, dietary stagnation, gastric yin deficiency, spleen deficiency and dampness stagnation. Halitosis means foul breath in the mouth, and Chinese medicine believes that it is mainly related to the dysfunction of the spleen and stomach, emotional discomfort (emotional discomfort), overwork and other factors. 1. Dampness and heat: foul breath, with belching (hiccups), bad breath is obvious after warming up, dizziness, heaviness, chest tightness, short and red urine (small amount of urine, dark yellow color), sticky stools, red tongue, yellow and greasy, smooth pulse. 2. Stagnant heat in the stomach and intestines: bad breath, accompanied by dry and knotty stools, distention and fullness in the epigastrium (abdomen), feeling of redness in the face and heat in the body, disturbed and restless, desire to drink cold water from time to time, and short and reddish urination (small amount of urination, dark yellow in color). The tongue is red, the moss is burnt and yellow, and the pulse is stringy. 3. Dietary stagnation: bad breath, sour and rotten food odor in the mouth, obvious when belching, accompanied by discomfort of distention and stuffiness in the stomach and abdomen (abdominal sensation of flatulence and discomfort), not thinking about food, and undigested food in the stool. 4. Stomach Yin deficiency: bad breath, accompanied by poor appetite, insomnia, dry mouth and throat, constipation, red tongue, little moss, fine pulse (pulse becomes narrower and finer and faster). 5. Spleen deficiency and dampness: bad breath, accompanied by gastric distension and pain, poor appetite, constipation, pale and fat tongue with teeth marks on the side, white and greasy moss, and slippery pulse. When the above symptoms occur, we should consult the doctor in time, and after the identification of Chinese medicine, follow the doctor’s instructions to standardize the treatment.