For the disease of flaccid fever, we can avoid cold and rain and excessive fatigue by paying attention to cold and warmth in winter, increasing and decreasing clothes at any time when the climate changes from hot to cold. Strengthen physical exercise, enhance their resistance and adaptability to the natural environment. Drink plain water, autumn and winter dry climate, the human body is very easy to lack of water, often drink plain water, not only to ensure that the human body needs, but also can play a diuretic detoxification, the elimination of body waste efficacy for prevention. At present, the main use of integrated therapy. At present, the main use of integrated therapy. 1, supportive therapy: the patient’s systemic consumption is large, strengthen nutrition, blood transfusion, fluid transfusion, correction of systemic failure, is necessary for further treatment. 2, steroid hormone and antibiotic therapy: for active patients, nasal and facial ulceration, systemic failure, persistent high fever, poor food and drink, it is appropriate to use high-dose corticosteroid treatment, until the nasal and facial and systemic symptoms improve, and then change to small dose maintenance to clinical cure. Antibiotics should also be given to control infection. At this stage, cyclic nitrocarbamide (CCNU) can be used routinely, which is similar to alkylating agents and can inhibit nucleic acid and protein synthesis in the body, with rapid effect, especially the best antipyretic effect. Adults take 120mg orally once every 3-5 weeks, 5-6 times, total dose is 600-840mg.