Fever can be caused by excessive warmth, infectious diseases or inadequate water feeding in hot summers, and newborns should be actively searched for causes and given safe and effective treatment measures. However, newborns are still immature in thermoregulatory functions and are susceptible to external environmental influences, so they generally do not need to take antipyretic drugs, and the main way to reduce heat is through physical cooling. When the body temperature of a newborn is below 38℃, it is generally not necessary to deal with it, and the room temperature can be slightly lowered so that the infant can achieve the purpose of reducing fever through natural heat dissipation; 2. When the body temperature is greater than 38℃, the child can be given a warm bath or antipyretic patch to achieve the role of physical cooling; 3. The fever should be treated with physical cooling. Parents are strictly forbidden to use medication on their own, especially aspirin and acetaminophen to reduce fever; 2, Attention should be paid when cooling, once the newborn’s body temperature drops, cooling measures should be stopped to avoid causing hypothermia in the child.