Children with fever can be given warm water to wipe their bodies, which is a form of physical cooling. After a fever, children will have aches and pains around the body and their mental state is not good. Wiping children’s body with warm water, such as under the neck, neck, armpits, groin and other parts of the body, can effectively take away the heat of the child’s body through the operation of blood circulation, and after the heat is taken away, the body temperature will be reduced. Because of the circulation of large blood vessels in the neck and armpits, wiping with warm water can lower the body temperature through blood circulation. The application of warm water to children’s bodies is relatively effective and has fewer side effects, so it can be applied to children in a timely manner.