In general, bad breath odor may be physiological or pathological, and can be improved according to the different causes of the use of drugs, mouthwash and removal of irritants and other methods. 1. Physiological: Physiological bad breath is mainly due to the intake of too much odorous food, such as onions, garlic, etc., or men long-term smoking and alcohol abuse and other bad habits, resulting in the formation of bad breath in the oral cavity breeding odor, generally stop the intake of odorous food, and timely correction of personal bad habits can be improved. 2. Pathological: Pathological bad breath is mainly due to oral cavity, bad restorations, periodontitis and digestive system Helicobacter pylori infection, indigestion and other diseases. (1) oral disease: for tooth decay leading to bad breath, you need to go to the hospital stomatology department for oral examination, timely repair of caries; for bad restorations produce bad smell, you need to remove the bad restorations in time and then re-repair; if there is periodontitis leading to bad breath odor, you need to carry out routine scaling and periodontal treatment to remove the stimulus factors such as dental calculus, so as to improve the problem of halitosis. Problems. (2) digestive system: for chronic gastritis combined with Helicobacter pylori infection leading to bad breath symptoms, you need to go to the hospital for breath test to confirm the diagnosis and then use omeprazole, clarithromycin dispersible tablets and other drugs under the guidance of the doctor for treatment, so as to improve the symptoms of bad breath; For indigestion, drugs such as domperidone tablets and cimetidine tablets can be used for treatment under the guidance of a doctor.