Male, 40 years old, was admitted to the hospital with “left hand movement disorder for 14 years after radiation therapy, shoulder sensory abnormalities for 1 week”, and was diagnosed with myasthenia gravis. Four days after admission, the patient started to have fever, which could reach 39.8℃ in the daytime, and could subside to normal at night. The patient has a normal urine, a pale tongue with white fur, and a slightly solid pulse with slippery left and right strings. The patient was identified as a combination of Shaoyang and Yangming in Chinese medicine, with evidence of Chai Hu and Gui Zhi Tang. Chai Hu 15, Scutellaria baicalensis 12, Fuxianxia 12, Dazao jujube 10, roasted licorice 6, Radix Codonopsis pilosulae 10, Su Ye 10, Gui Zhi 10, Paeonia lactiflora 10, gypsum 30, three doses of decoction The patient took one dose of Chinese medicine and had a body temperature of 36.9℃ the next day. There was no obvious change in the tongue image, and the pulse was softer but still strong.