6-year-old child fever does not return how to do

6-year-old child fever does not return first to clear the cause of fever, if it is due to bacterial infection caused by fever, need to give antibiotic treatment, if it is due to hyperthyroidism, blood system diseases caused by fever, need to actively treat the primary disease. If the child's temperature exceeds 38.5 degrees, but also need oral antipyretic, prevent febrile convulsions.