Physical cooling methods there are three: First, 4 months baby fever available cooling patch, stick on the forehead, neck and groin can be, 4-6 hours can be replaced once, for 38 ℃ below the low fever. Second, take a warm bath, take a bath to cool down fast, and for 4 months baby is more convenient, easy to accept, the water temperature of 36-40 ℃, applicable to moderate fever to high fever, the body temperature is relatively high up to 39 ℃, you can also take a warm bath, can be in the water a little more soak for a while, so that the child’s body temperature down, wash and dry the body quickly, so as not to catch a cold. Third, warm water bath, pay attention not to use alcohol so as not to be absorbed through the skin, warm water to wipe the baby’s head, neck, armpits and groin, etc. in order to facilitate the dissipation of heat, the physical cooling is effective, but the maintenance of a short period of time, such as recurrent hyperthermia to go to the hospital.