The best treatment for a child with a fever of 38.5 degrees is a combination of symptomatic and causative management. Symptomatic treatment includes physical cooling and medication to lower the temperature. Causative treatment includes identifying the cause of the illness, such as bacterial infections can be treated with drugs such as cefaclor. 1. Symptomatic treatment: (1) Physical cooling: It can be assisted by physical cooling, which mainly includes warm water bath, shower, ice pack and drinking more water. Effective physical cooling can reduce the child’s discomfort, while lowering the body temperature and reducing the risk. (2) Medication: Acetaminophen or ibuprofen can be given orally to lower the body temperature and reduce the incidence of febrile convulsions (convulsions caused by high fever). 2. Treatment of the cause: (1) Infectious fever: bacterial infection, can take cefixime, cefaclor and other antibacterial drugs for treatment; mycoplasma infection can be treated with azithromycin and other antimicrobials; if it is influenza virus can be used for antiviral drugs such as oseltamivir. (2) Non-infectious fever: for example, cutaneous mucocutaneous lymph node syndrome, usually take gammaglobulin, prednisone and other treatments. The child has a fever of 38.5 degrees, there are other ways to deal with it, it is recommended to consult a doctor in a timely manner, to find the cause of the cause of treatment, the above medication as prescribed by the doctor.