The normal body temperature of a newborn baby fluctuates between 36-37.3℃, 37℃ is normal. If the body temperature is lower than 36℃, pay attention to keep warm and add clothes in time. If the body temperature is higher than 37.3℃, pay attention to observe the child’s symptoms, and if the general condition is better, you can first carry out physical cooling by rubbing warm water on the folds of the body, such as the armpits. Lower the ambient temperature, reduce clothing, and it does not matter if the body temperature drops to normal. If the temperature continues to rise, or if the child has a combination of symptoms such as coughing, spitting up, poor response and reduced milk intake, it is recommended to seek prompt medical attention. Because of the poor resistance of newborns, the possibility of fever caused by infection is the greatest, and serious infection can easily cause sepsis or septic meningitis.