When your baby has a fever, you can use a cold towel to apply to the forehead. Using a towel to apply to the forehead is one of the methods of physical cooling, and also includes warm towels to the forehead, groin, armpits and other parts. If the body temperature rises above 38.5℃, it needs to be treated with antipyretic drugs, such as ibuprofen and acetaminophen, etc. The effect of relying solely on physical cooling methods is not good. If the body temperature is between 37.0-38.5℃, physical cooling can be used to restore the body temperature to normal.