For bad breath caused by gastrointestinal disorders, regulating the stomach and intestines is useful in removing bad breath. Halitosis can be caused by a variety of factors, including intestinal disorders are also common factors that lead to bad breath, therefore, regulating the stomach is useful in removing bad breath. Helicobacter pylori infection is an important cause of bad breath, and can be treated with medication to sterilize the bacteria, such as amoxicillin, clarithromycin, levofloxacin, furazolidone, metronidazole and other drugs. Regulate the stomach and intestines also need to avoid eating greasy, spicy, stimulating food for a long time, so as not to increase the burden on the stomach and intestines. Usually should choose light, nutritious food, eat more fresh fruits and vegetables, to ensure balanced nutrition. Daily exercise can be reasonable, enhance the body’s immunity. Usually should also maintain a positive and optimistic mindset. If the patient has bad breath, need to clarify the cause, symptomatic treatment, usually maintain good hygiene habits, so as not to aggravate bad breath.