The reason for fever in the afternoon may be that the infection in the body has not been completely controlled, tuberculosis infection and physiological low fever, etc., according to the specific reasons for the corresponding treatment. 1. Inflammation in the body has not been controlled: the fever may appear in the afternoon; you can conduct blood tests to further clarify whether there may be a bacterial infection, if there is a bacterial infection and timely anti-infection treatment, you can take roxithromycin, levofloxacin and other antibiotics. 2. Tuberculosis infection: low fever in the afternoon accompanied by chest pain, cough, sputum, hemoptysis, and night sweats, fatigue, emaciation and other symptoms, it is recommended to go to the hospital to improve the relevant examination of the existence of tuberculosis infection, if necessary, give anti-tuberculosis treatment, such as isoniazid, rifampicin and so on. 3. Physiological low fever: body temperature measurement shows low fever but in fact it is the normal range of variation, such as nervousness, after strenuous exercise, before menstruation and the early stages of pregnancy can also have a low fever phenomenon. There are other reasons for fever in the afternoon, you should consult a doctor in time, follow the doctor’s instructions to standardize the treatment, do not use drugs privately, so as not to cause danger.