There is no so-called “best” way to remove bad breath, bad breath may be caused by physiological factors, may also be caused by oral diseases, gastrointestinal diseases, nasopharyngeal diseases and other diseases, clinically can be adjusted through lifestyle, medication, surgical treatment and other methods to solve. ⒈ adjust lifestyle: poor living habits or hygiene habits and other physiological factors can lead to bad breath. It is recommended that patients need to brush their teeth every morning and evening, you can use mouthwash to rinse your mouth after meals, and use dental floss to clean between the teeth, excess food debris and plaque bacteria to remove, and usually quit smoking and limit alcohol, and drink more water to avoid aggravating bad breath. Peel medication: some oral diseases can also cause bad breath, such as periodontitis. Periodontitis can be assisted in the periodontal use of Milocycline for anti-inflammatory. Halitosis caused by chronic gastritis can be treated with clarithromycin, metronidazole, levofloxacin, furazolidone and other drugs. Halitosis caused by sinusitis can be treated with metronidazole, tinidazole, intranasal decongestant and other drugs. ③Surgical treatment: For patients with periodontitis, it can be treated by periodontal surgery. If the bad breath caused by wisdom teeth peri-coronitis, feasible peri-coronary flushing, tooth extraction and other treatment of bad breath. Sinusitis patients, if necessary, endoscopic sinus surgery and other treatments. Chronic gastritis after drug treatment is ineffective, feasible submucosal dissection or mucosal resection. If the patient’s halitosis by adjusting lifestyle symptoms do not improve, should be timely to the hospital, clear cause, symptomatic treatment, the use of drugs need to follow the doctor’s instructions.