Gentian Liver Pill is not generally used to treat liver fire and bad breath, but is mainly used for bitter mouth symptoms caused by damp heat in the liver and gallbladder. Generally bad breath is mostly caused by poor digestive function, as liver and gallbladder generally cause bitterness in the mouth and do not cause bad breath symptoms. And it is also not recommended to use Gentian and Liver Pill because of its toxicity, especially the Guanmu Tong in it, which contains aristolochic acid, has been banned and has nephrotoxicity and hepatotoxicity and needs to be used with caution. In the case of liver fire and bad breath, it must be noted that most of them are caused by abnormal oral infections, or poor digestive function, and can be treated with other intestinal cleansing and digestion promoting drugs. In addition, it is important to pay attention to oral care, including brushing, scaling, rinsing, and treatment of oral infectious diseases. It is also necessary to combine dietary regulation, reduce greasy, fried, spicy and stimulating foods, and quit smoking and alcohol in order to alleviate bad breath symptoms.