Fever is a regulatory process in which the thermoregulatory center located in the hypothalamus of the body is stimulated by the action of a thermogenic agent, and an increase in body temperature occurs. In general, when the body temperature is below 38.5℃, appropriate physical cooling methods can be used. There are many methods of physical cooling, and their efficacy varies, and the speed of cooling needs to be determined according to your own situation, and cannot be generalized. In general, according to their own situation, and the correct mastery of physical cooling methods, can achieve faster cooling purposes. A commonly used physical cooling methods 1, drink more water: a small number of times to drink warm water, not only to replenish the liquid, but also to speed up sweating, urination, to promote the body’s toxins and metabolic waste discharge; 2, alcohol wipe method: with 75% of the alcohol 100ml, plus 27-30 ℃ warm water equal amount, wipe with a towel from the neck, from top to bottom, to the armpits, groin; 3, ice bag cold compress method. The appropriate amount of ice into the ice bag, then add the appropriate amount of water, wrapped outside on a layer of towels, placed on the forehead of patients for 15 minutes; 4, towel wet compress method: wet cold water towel wrung into a semi-dry, put on the forehead of patients or armpits, groin and other large vascular parts, to achieve cooling purposes; 5, warm water bath method: that is, with a warm water towel wipe the whole body, the temperature of the water is 32-34 ℃, each wipe time 10-20 minutes, focusing on wiping the armpits, elbows, groin and other places. Second, physical cooling precautions 1, cold-sensitive patients should not use cold compresses and other methods of cooling, so as not to make the patient shivering; 2, regardless of the cooling method, should be placed in the heart of the feet at the same time hot water bags; 3, there is a tendency to bleeding rash, subcutaneous bleeding spots and patients with skin damage prohibited alcohol bath; 4, physical cooling 30 minutes after the measurement of body temperature, while closely observing the patient’s blood pressure, pulse, respiratory condition; 5, when the physical cooling rash, subcutaneous bleeding spots and with skin damage prohibited alcohol bath; 4, physical cooling 30 minutes after the measurement of body temperature, while closely observing the patient’s blood pressure, pulse, respiratory condition; 5, when the physical cooling. 5.When applying cold compresses, observe the local skin and change the position in time to prevent frostbite.