Generally children rarely have fever for more than five days, if the child’s fever does not subside after five days, then the blood can be tested for mycoplasma antibodies, if necessary, the application of gammaglobulin, aspirin, etc., as follows: 1, laboratory tests for blood mycoplasma antibodies, fever persists, often caused by Mycoplasma pneumoniae infection, to timely anti-mycoplasma treatment. You can choose macrolides, such as erythromycin, roxithromycin, azithromycin, etc., the fever will be quickly relieved; 2. At this time, the child’s age is often between 1-3 years old, the fever temperature is also relatively high, high fever persists, and the application of antibiotics is not effective, you can check Kawasaki disease and other non-infectious diseases, Kawasaki disease treatment to choose gammaglobulin, aspirin, etc.