In the summer of 1993, a female patient with rosacea, 35 years old, had a history of 5 years. The patient was diagnosed with rosacea by several hospitals, and the treatment had no significant effect. When the patient was desperate, she came to the clinic to seek treatment from Yu after being recommended by her patients. The patient said: “patients are recommended that you cure stubborn skin disease efficacy, I decided to let you cure, you said how to treat, I will how to cooperate. You must not have the burden of thought, the use of strong drugs on the use of”. I have read through the previous medical records and know that almost all conventional treatments have been used. It seemed that conventional treatment would not be effective, so I had to find another way, so I told the patient: because of the large number of patients in the outpatient clinic, it is impossible to have too much time to think about difficult patients, so it is better to come to me in the ward, so that I have time to understand the condition in detail, in order to seek a better treatment plan. The patient was happy to oblige. The next day, after my ward visit, the patient met to come for treatment. On examination: the patient’s nose was bright red with no pain or itching. According to the identification of the yin and yang properties of TCM surgical sores, the patient was considered to have a yang disease, which was a serious case of fire toxicity. We chose to use a heavy dose of Wu Wei Disinfectant Drink, hoping that the drug would be effective and reach the nest of the disease. After 3 doses, the condition improved and the patient was very happy, so he was prescribed 3 more doses according to the original prescription, but to his surprise, the condition was at a standstill after taking the medicine. The patient was very happy, so he was prescribed 3 doses of the original prescription, but after taking them, his condition was stagnant. Thinking that the heavy dose of Wu Wei Disinfectant Drink was not enough to attack the poison, he added whole scorpion and centipede to the prescription and ordered 3 doses to see the effect. After taking the medicine, the patient was happy that his condition had improved again, so he continued with 3 doses. However, at the time of follow-up, the condition was again in a stagnant state. It seems that it is impossible to cure this patient by continuing to apply the method of attacking and expelling the fire poison. So, what should be the next step to treat this patient? According to TCM, the lung opens the nose. Combined with the evidence of the tongue and pulse, it was indeed consistent with the evidence of “lung heat”. I took into account that the patient had previously used a number of prescriptions such as Loquat and Lung Clearance Drink, Cool Blood and Four Objects Tang, and Cool Blood and Lung Clearance Drink, all of which were ineffective. The evidence belongs to “lung heat”, but the formula is not effective, so we should choose another formula. Suddenly, he thought: Mao Xing Shi Gan Tang is an effective formula for treating pulmonary diseases in internal medicine, so he took 3 doses of Mao Xing Shi Gan Tang, and his condition was greatly reduced after the medicine, and he was cured after taking 5 doses.