Clinical treatment of bad breath effective method is to use different treatment methods for the cause of the disease, which causes bad breath is mainly divided into physiological and pathological two kinds. 1. Physiological bad breath (1) food factors: often eat onions, garlic, leeks and other foods or often drink alcohol and smoking, may lead to bad breath in the mouth to produce odor formation, generally stop the intake of too much odor over the food, and quit smoking and alcohol, can effectively treat the problem of bad breath. (2) hygiene factors: daily oral cleaning is not appropriate, food residues, soft dirt accumulation and thus breeding odor to produce bad breath, usually pay attention to diligent brushing, rinse, and develop the use of dental floss and other good habits can improve bad breath. 2. Pathological bad breath (1) oral disease: oral cavity, periodontal disease, poor restorations, and oral mucosal disease may produce bad breath, need to go to the hospital stomatology department for a full mouth examination, according to the cause of tooth filling, scaling, removal of poor restorations and other treatments, so as to improve the phenomenon of bad breath. (2) Gastrointestinal diseases: clinically, some patients with gastritis, Helicobacter pylori infection may also have bad breath symptoms, need to go to the gastroenterology department under the guidance of the doctor for triple or quadruple drug treatment. (3) oral cavity adjacent to the sinus infection: and oral cavity adjacent to the sinus infection may also have bad breath, such as sinusitis, maxillary sinusitis or pharyngeal suppurative tonsillitis, etc., need to take cephalosporin antibiotics and amoxicillin and other drugs to treat. Medications should be taken under the direction of a physician.