Fever is a self-protective reaction of the body, but when the body temperature is too high, the patient’s body will show symptoms such as shortness of breath and coma, and in severe cases, too high a temperature can also cause brain tissue damage. Physical cooling has fewer adverse reactions, good cooling effect, safe features, but for adults in the best method of physical fever, should also be selected according to the specific circumstances of the patient. A physical cooling methods 1, ice bag cooling: for patients with high fever, can be placed in the neck, axilla, popliteal fossa and groin ice bag, ice bags, including chemical ice bags, saline ice bags and ethanol ice bags, can absorb heat through the role of conduction, good patient adaptability; 2, ice cap cooling: can prevent brain tissue damage caused by fever, to prevent the occurrence of cerebral edema; 3, bath cooling: can use warm water, alcohol for Although the antipyretic time is not long-lasting, but can be quickly cooled in a short period of time; 4, intravenous cooling: can be used for heat stroke hyperthermia caused by hypothalamic dysfunction; 5, cooling blanket cooling: can be used for patients with persistent high fever that does not subside. Second, physical cooling precautions 1, for cold-sensitive patients, physical cooling should not be used to prevent patients from chills. If the patient has blood system diseases, blood circulation disorders, etc., physical cooling should also be disabled; 2. When applying cold compresses, the local skin should be observed and the position should be changed in time to prevent frostbite; 3. When using alcohol rubbing bath, attention should be paid to whether there is skin damage at the rubbing site; 4. After taking medication to cool the body, physical cooling should not be carried out at the same time to avoid affecting the effect of medication.