Fever 38 ℃ does not go down first of all should clarify the cause of fever, give the cause of treatment, such as anti-bacterial or viral infection, anti-tuberculosis, tumor fever symptomatic treatment and so on. 1. Infection: the body will have fever due to bacterial or viral infection, which should be given antibacterial drugs such as cefprozil tablets, antiviral granules and other anti-infection treatment. 2. Tuberculosis: when suffering from tuberculosis, low-grade fever will appear, and anti-tuberculosis treatment such as isoniazid, rifampicin and streptomycin should be given, and when the tuberculosis gets better, the fever will also get better. 3. Tumor: when the organism suffers from tumor, it will lead to fever due to secondary infection, and it can also lead to fever due to the decrease of white blood cells caused by chemotherapy, the former is given anti-infection treatment such as amoxicillin capsule, etc., and the latter needs to be given to enhance the white blood cells treatment, such as leukopoietin. 4. Other: hyperthyroidism can also cause elevated body temperature, give methimazole, if necessary, surgical treatment. Medications should be used under medical supervision.