The cause of bad breath is often chronic tonsillitis, due to retention of caseous decay in the tonsillar crypts or a large number of anaerobic infections. General treatment, medication and surgery are often used to control the disease and improve the symptoms. 1. General treatment: participate in physical exercise to enhance physical fitness and resistance to disease. 2. Drug therapy: the treatment of this disease should not be limited to antibacterial drugs, but should be combined with immunotherapy or anti-allergic measures, including the use of bacterial products with desensitization (such as desensitization with streptococcal allergens and vaccines), and a variety of immune-enhancing drugs, such as injections of placenta globulin, transfer factors and so on. 2. Surgical treatment: If the bad breath is due to inflammation of the tonsils and meets the surgical indications for tonsillectomy, plasma knife tonsillectomy can be considered. When it is clear that the tonsils are inflamed and produce bad breath, patients need to actively consult a doctor for a systematic examination, follow the doctor’s instructions to standardize the treatment.