Causes of children’s infusion or recurrent fever, mainly including the following situations: 1, due to the symptoms caused by the medication is not symptomatic. If the application of drugs and children’s disease has no direct causal relationship, the drug is symptomatic, the disease condition is not controlled will cause recurrent fever, the need for timely adjustment of the medication program.2, due to the condition of the process caused. The cause of children’s fever is mainly due to a variety of infections, but viral or bacterial infections mostly need a process, in many cases need to be transfused for a few days before the condition will be controlled, the fever is no longer recurring.