Bad breath can be caused by excessive dampness in the body, or dampness and heat evils entangling with each other in the body, resulting in weakened function of the relevant organs, especially the food in the stomach is difficult to digest and excessive spoilage occurs and manifests as bad breath. It can also be excessive dampness in the body, mouth ulcers or gum-related diseases, or tooth decay, periodontitis, food embedding, etc. can lead to bad breath. There are other causes of bad breath besides the mouth and stomach, which require comprehensive examination and treatment under the guidance of a hospital doctor. For the treatment of bad breath, the treatment of dampness is a large part of the more common flat stomach, ginseng and white atractylodes and so on the rational application of the halitosis are very effective, in addition to appropriate exercise to enhance gastrointestinal motility is also the treatment of halitosis.