The halitosis caused by the patient's bad stomach and intestines is generally considered to be the manifestation of large stomach fire and damp heat in the liver and gallbladder, which may have constipation habits with the patient. The patient often eats some food that stimulates the fire, causing the clinical symptoms caused by the accumulation of damp heat toxin in the body. It is suggested that the patient can properly choose Chinese patent medicines that clear stomach fire and soothe intestines and defecate, and drink more water during the treatment, Light diet, no smoking and no drinking. If bad breath is accompanied by stomach pain, bloating and other stomach discomfort, it is necessary to consider the possibility of Helicobacter pylori infection, and it is recommended to go to the hospital for c14. The patient was diagnosed by breath test and treated according to the doctor's advice.