In the clinic there is no easiest way to treat bad breath, bad breath is caused by oral diseases, Helicobacter pylori infection, diet, it is recommended that patients can go to the hospital for symptomatic treatment. 1. Oral disease: general periodontitis is a common cause of bad breath disease, periodontitis causes bad breath is mainly due to bacterial decomposition products of the odor, can be treated by gingival scaling or gingival scraping and other periodontal treatments, but also under the guidance of the doctor to use medication, such as roxithromycin capsule or metronidazole tablets, which can terminate the development of periodontitis, improve bad breath. 2. Helicobacter pylori infection: If the patient suffers from Helicobacter pylori infection, it can also cause bad breath, mainly because of the odor produced by the bacterial fermentation, it is recommended that the patient can go to the hospital, and can use medication under the guidance of the doctor, such as amoxicillin, clarithromycin, metronidazole and so on. 3. Diet: patients with bad breath caused by irritating food, such as durian, garlic, stinky tofu, etc., patients will leave a bad taste in the mouth after eating, it is recommended that patients should avoid eating irritating food. There may be other causes of bad breath, it is recommended that patients need to go to the hospital in a timely manner when bad breath occurs, can be under the guidance of the doctor symptomatic treatment, the use of drugs need to follow the doctor’s instructions.