Generally there is no so-called fastest and best solution for bad breath, and the appropriate method should be chosen according to the difference of the patient’s individual condition, and the commonly used methods usually include scaling, containing mouthwash, and taking medicines to help digestion. There are many causes of bad breath, such as throat diseases, digestive system diseases, oral diseases and so on. 1. Throat disease: when the patient tonsil inflammation or bacterial infection, first of all, should change the habits of life and diet, and then pay attention to enhance their physical fitness, and finally can also follow the doctor’s instructions to eat some antibiotics, such as cefixime, amoxicillin and so on. 2. Digestive system diseases: when the patient suffers from dyspepsia, need to take under the guidance of the doctor to promote gastrointestinal peristalsis drugs (such as domperidone, mosapride citrate, etc.), in addition, the patient’s daily diet should be based on easy-to-digest food. 3. Oral disease: If the patient’s bad breath is caused by dental calculus or dental caries, the general methods include brushing in the morning and evening, rinsing after meals, regular scaling, and treatment at the stomatology department of regular hospitals. It is recommended that patients go to the hospital in time for relevant examinations, and give timely treatment after clarifying the causes.