Baby fever 38.5 degrees, may be viral or bacterial caused by upper respiratory tract infections, etc., can be used under the guidance of the doctor symptomatic treatment and causative treatment, symptomatic treatment of physical cooling, medication to lower the temperature, etc., causative treatment is the cause of the use of medication and so on. 1. Symptomatic treatment: (1) Physical hypothermia: mainly includes warm water bath, ice packs, etc. Effective physical hypothermia can reduce the baby’s discomfort and lower the body temperature at the same time. (2) drug cooling: usually can use acetaminophen or ibuprofen oral, in order to reduce body temperature, reduce the incidence of febrile convulsions. 2. Treatment of the cause: baby fever is mostly caused by infection of pathogenic bacteria, should be under the guidance of the doctor to clarify the cause of the disease, if the bacterial infection, you can use cefixime, cefaclor and other drugs to treat; if the mycoplasma infection, you can use azithromycin treatment, if the influenza virus infection, mainly symptomatic treatment. When the baby has a fever of 38.5 degrees, it is recommended that parents take the baby to the hospital in time to find out the cause of the disease and follow the doctor’s instructions for medication, parents should not give the baby medication on their own, so as not to delay the condition.