Improvement of bad breath needs to be taken according to the specific causes, such as improper diet, gastric diseases, periodontitis, etc. After a clear diagnosis, general treatment, scaling treatment, medication, etc. can be chosen. 1. Improper diet: some foods are irritating, such as durian, garlic, stinky tofu, etc., which can lead to bad breath, this phenomenon does not require special treatment, and usually can be relieved by avoiding the intake of irritating foods. 2. Gastric diseases: acid reflux, Helicobacter pylori infection can also lead to improve the phenomenon of bad breath, you need to choose to inhibit gastric acid and protect the gastric mucosa of the drugs, such as omeprazole, domperidone and so on. 3. Periodontitis: periodontitis is a common factor causing bad breath, need to take supragingival scaling, subgingival scraping, and with medication, such as cefdinir, amoxicillin, the main purpose is to terminate the development of periodontitis, so as to improve the symptoms. Improvement of halitosis causes are very many, it is recommended to go to the hospital as soon as possible, in accordance with the doctor’s instructions to take standardized treatment, not private treatment, so as not to lead to adverse consequences, the use of drugs need to follow the doctor’s instructions.