Physical cooling refers to the use of physical methods to bring down the body temperature, which can be divided into two methods: local and systemic cooling. When the patient is in a high fever state, the following physical fever reduction methods can be chosen to quickly reduce fever: 1. Local cold compresses: local cold compresses commonly used materials for ice bags, antipyretic patches, etc.. The parts placed are usually the patient’s forehead, neck, armpit, groin, etc. During the cold compress, the color of the local skin should be observed, and if pallor and cyanosis occur, it should be stopped immediately to prevent impaired blood circulation or frostbite. Those who need to apply cold compresses for a long time should rest for an hour before repeated use. 2, warm water wipe: wipe the whole body with warm water is a more effective cooling method, the water temperature should be maintained at 32-34 ℃. Each wipe for about 10 minutes, wipe the key parts of the skin folds, such as the neck, armpits, elbow folds, groin, etc., through the evaporation of excess water on the body surface, effectively reduce body temperature. 3.Lower the ambient temperature and drink more water: When the patient’s high fever is manifested as fever, sweating and weakness, the indoor temperature can be lowered and attention can be paid to ventilation. Patients can reduce their clothing in an appropriate amount to avoid covering the heat; during the fever period, attention should be paid to drinking more water to replenish the lost water while also taking away the heat from the body through urination to help reduce the temperature.