Halitosis caused by stomach fire means that the patient’s exhaled gas has an unpleasant odor. In patients with strong stomach fire (exuberant fire-heat and evil qi in the stomach), the turbid qi in the stomach travels up the meridians, leading to the symptom of bad breath, which is mainly manifested as a distinctive odor in the exhaled gas. In addition, patients with severe stomach fire, in addition to the symptoms of bad breath, may also have dry mouth, thirst, bitter mouth, dry stools, nosebleeds, red, swollen and painful gums, dizziness, headache and other symptoms. Patients can choose medicines to clear stomach fire under doctor’s guidance for treatment, such as clearing stomach powder, big Chaihu granules and so on. Daily diet should be as light as possible, eat less spicy and greasy food, and gargle after meals. Brush your teeth every morning and evening.