Halitosis is mostly caused by stomach fire and chancre, which can be treated with herbal formulae such as Qinggong San and Feier Pill. 1. Qinggong San is mainly composed of Radix Rehmanniae Praeparata, Radix Angelicae Sinensis, Rhizoma Polygoni Multiflori and other medicines, with the effect of clearing the stomach and cooling the blood, and is mainly used for the treatment of gastric fire and toothache, which can be seen in the symptoms of toothache, headache and cheek fever, the teeth like cold and hate hot, or teeth bleeding, or gums red, swollen and ulceration, or lips and tongue, cheeks and swollen and painful, hot and stinky breath, dry mouth and tongue, tongue with red coating and yellow fur, and smooth and number of pulses. 2. Fertilizer pill is mainly composed of nutmeg, Shenqu, wood, malt, betel nut and other drugs, with the effect of killing worms and eliminating accumulation, strengthening the spleen and clearing away heat, mainly used for the treatment of children’s chancre, the symptoms of dyspepsia, yellowish face and shape, belly and abdomen distension, bad breath, fever, yellowish and greasy tongue, and so on. If similar symptoms occur, it is recommended to consult a traditional Chinese medicine practitioner for a prescription and standardized treatment to avoid self-medication.