Physical cooling generally involves rubbing the skin every 30 minutes for about 3 to 5 minutes at a time. Physical cooling is generally used to dilute alcohol or warm water to wipe the local skin, by making blood vessels dilated, to increase the ability of the local skin to dissipate heat. Weak old people and children are recommended to use warm water to wipe their bodies when they have a fever. Physical cooling wipes take 3 to 5 minutes a time, and the interval between two times is about 30 minutes. Measure the body temperature before wiping, if it reaches 38.5 degrees Celsius or above usually need to use antipyretic drugs under the guidance of a doctor, such as ibuprofen extended-release tablets. After the physical cooling should pay attention to keep warm, avoid cold, wipe should not be too hard to bruise the skin, persistent fever should be as soon as possible to seek medical treatment.