The contraindications of Bai Hu Tang are not clear at present, Bai Hu Tang can be used for Qi division heat exuberance syndrome. Bai Hu Tang is from “The Treatise on Typhoid Fever”, which consists of Zhi Mu, round-grained rice, gypsum and licorice, with the effect of generating fluids and clearing heat, mainly used for treating the syndrome of heat exuberance of qi, which includes strong heat, red face, sweating and malignant heat, thirst and thirst, and flooding of the pulse. In the formula, gypsum is used to clear the heat of yangming qi, quenching thirst and removing vexation; Zhimu nourishes yin and moistens dryness (nourishes yin essence and removes heat), quenching thirst and removing vexation; round-grained rice and sizzling licorice benefit the stomach and promote the production of fluids (nourishing the stomach by replenishing fluids within the stomach); and sizzling licorice is also used to harmonize the various medicines (harmonizing the properties of different traditional Chinese medicines). The combination of the four herbs has the effect of clearing heat and removing vexation, generating fluids and quenching thirst (promoting the production of fluids to relieve thirst). Although the contraindications to the use of Bai Hu Tang are not clear at present, it should be noted that it should not be misused in cases of fever without sweating and without thirst; in cases of floating or sinking pulse; in cases of fever due to blood deficiency, and in cases of flooding of the pulse, and in cases of yin-sheng and yang-sheng with true cold and false heat. The contraindications and adverse reactions of Bai Hu Tang are still unclear, please do not use this formula on your own to avoid adverse reactions, if you feel unwell, it is recommended to go to the hospital as soon as possible.