The most common cause of recurrent fever in adults is often the presence of an infection in the body, so first you need to observe what discomfort there is. Secondly, you need to go to the hospital to check the blood count. If the blood count is elevated, it means that there is a bacterial infection in the body, which needs to be treated with antibiotics. If the temperature of the fever is high, intravenous antibiotics, such as ceftriaxone or penicillin, are often needed. If the temperature of the fever is low, oral antibiotics are often needed, such as cefaclor or cefradine or cefadroxil. If there is an allergy to the above drugs, azithromycin or roxithromycin can be used for treatment. If the body temperature exceeds 38.5 degrees, it is necessary to take antipyretic and analgesic drugs for treatment, such as ibuprofen suspension. However, if there is a decrease in white blood cell count, you should not take ibuprofen suspension, and you should go to the hospital quickly for consultation.