Cassia seeds and chrysanthemum in water has a certain effect on relieving bad breath, but does not play a therapeutic effect. It should be judged according to the cause of bad breath, and then for the cause of symptomatic treatment, in order to effectively solve the problem of bad breath. Cassia seeds is a traditional Chinese medicine, mainly beneficial to the kidney and liver, clear heat and eyesight, laxative effect, while chrysanthemum has heat detoxification, antioxidant, anti-fatigue and other effects. Cassia seeds and chrysanthemum tea together have a certain aromatic smell that can relieve bad breath caused by fire, and drinking honeysuckle tea, Longjing tea or Pu’er tea can also relieve the symptoms. However, if you want to treat bad breath, you need to take professional means. Usually there are many causes of halitosis, which can be divided into physiological and pathological: 1, physiological: commonly caused by poor oral hygiene, long-term smoking, consumption of heavy food, such cases generally need to adjust the daily diet, lifestyle habits, and enhance oral hygiene. Such as daily life should pay attention to a light diet, try not to smoke, maintain oral hygiene, brush your teeth in the morning and evening, rinse your mouth after meals, as well as use dental floss to clean the teeth; 2, pathological: often due to dental caries, periodontitis, gingivitis and other oral diseases or gastric ulcer, gastritis, pyloric obstruction, gastric cancer and other gastrointestinal diseases, need to improve the relevant examination, clear the cause of the cause of treatment, so as to eliminate bad breath symptoms.