A single medicine is not able to treat bad breath, bad breath can be divided into stomach fire, liver fire, heart fire and other types of evidence, should be identified and medication. 1. Stomach fire: mainly manifested as bitter breath, bad breath, dry mouth, swollen and painful gums, dry and knotty stools, yellow urine, yellow tongue coating, pulse, can be used to clear the stomach and diarrhea (remove stomach fire) of the medication, such as oxalic acid and stomach pills, Huanglian stomach pills, stomach pills, and so on; 2. Liver and gallbladder fire and heat: manifesting as burning pain in both hypochondriums, bitter mouth and bad breath, irritability, red face and red eyes, yellow tongue coating and number of strings on the pulse, which need to be treated with medicines for clearing liver and gallbladder fire (clearing liver and gallbladder fire and evil spirits), such as Longdian Diarrhea Liver Pill, Zuojin Pill, and so on; 3. Heart fire: manifested as heartburn and insomnia, dreamy, bitter mouth and bad breath, mouth and tongue sores, short and red urine (small amount of urine, dark yellow color), red tongue, yellow moss, number of pulses, need to clear the heart and diarrhea of fire (clear the fire of the heart) medication, such as niuhuangxinpianwan, guide chi-san, and so on. Halitosis cannot be cured by a single medicine, so it must be treated with traditional Chinese medicine under the guidance of a Chinese medicine practitioner’s diagnosis, and should not be trusted to treat the disease with a single prescription or prescription. You should pay attention to eating less spicy and inflammatory food on weekdays, which can relieve bad breath to a certain extent.