A child who has a fever that recedes and then has another fever is suffering from recurrent fevers. Recurrent fevers indicate that the factors causing the fever in the child have not been effectively controlled. Most of the factors that cause fever in children are infectious factors, including respiratory viruses, intestinal viruses or bacterial, mycoplasma and chlamydia infections. Therefore, you should visit the hospital and get checked out as soon as possible and see the pediatric outpatient emergency department. The main tests are routine blood tests, C-reactive protein, and calcitoninogen. If the leukocytes are elevated, C-reactive protein is significantly elevated, and calcitoninogen is elevated, a bacterial infection is considered. At this time, oral antibiotic treatment is needed, commonly used penicillin, such as amoxicillin, or cephalosporins, such as cefaclor, cefixime, etc. If the inflammatory index is quite high, the fever is prolonged, and the symptoms of infection and toxicity are severe, hospitalization for observation or hospitalization with intravenous antibiotic treatment may be required. Usually, cephalosporin III antibiotics such as cefotaxime sodium and ceftriaxone will be chosen. If the blood picture is normal, C-reactive protein is not high, and calcitoninogen is not high, the possibility of viral infection is considered. At this time, symptomatic supportive treatment can be carried out, you can take clearing heat, detoxification, antiviral Chinese medicine, such as antiviral oral liquid. In addition, you can also use nebulized drugs with antiviral effects, such as interferon nebulizer, for nebulized treatment. Of course, if the child’s fever is caused by infectious factors such as mycoplasma and chlamydia, macrolides, commonly used as azithromycin, may be needed.