Physical cooling methods for children with fever include lowering the ambient temperature, warm baths, cold saline enemas, and the use of ice pillows, ice caps and ice blankets. For newborns and small infants, physical cooling is mainly adopted, such as unpacking the clothes and putting the baby in a room at 22-24℃, or warm water bath to cool down the fever. Physical cooling according to the principle of hot to cold down, cold to warm down, that is, high fever with hot extremities, no chills can be cooled with cold water bath, ice, etc.. Fever with cold extremities, chills, chills give warm water bath until the skin is red and turn warm, drink more warm water can also help to cool down.