Fever every afternoon may be related to viral infections, bacterial infections, tuberculosis, tumors, as well as some immune system abnormalities, in the treatment of the first to improve the relevant examination, and then to take effective treatment for the cause of the disease. 1. Viral infection: mainly refers to viral colds, which can be clearly diagnosed through other clinical manifestations and blood tests, and is mainly treated with anti-flu drugs, such as compound aminophenolamine tablets. 2. Bacterial infections: in general, the cause of the disease can be clarified through routine blood tests and C-reactive protein tests, and some sensitive antibiotics can be chosen for treatment, such as amoxicillin, roxithromycin and so on. 3. Tuberculosis: Generally, it can be clearly diagnosed through chest X-ray, sputum examination and tuberculin test, and anti-tuberculosis drugs, such as rifampicin, isoniazid, ethambutol, pyrazinamide and so on, should be chosen in the treatment. 4. Autoimmune system abnormalities: mainly including systemic lupus erythematosus, rheumatoid arthritis, rheumatic fever and so on, generally can be combined with the clinical manifestations as well as anti-nuclear antibody, anti-“O” test, rheumatoid factor and other test results to clearly diagnose, and in the treatment can be given to some immunomodulators, such as In terms of treatment, some immunomodulators can be given, such as cyclophosphamide, tretinoin, and so on. Due to the complexity of the cause, the specific situation must be timely consultation, and under the guidance of the doctor for standardized treatment.