There is no effective way to reduce fever quickly, and the main ways to reduce fever include physical hypothermia, drug hypothermia and so on. 1. Physical hypothermia: Physical hypothermia has a longer time to reduce fever and is suitable for patients with low fever. Physical cooling is the use of warm water to wipe the body to lower the temperature. Ice packs should be placed in the armpits, groin and other superficial places of large blood vessels, and infants and children should avoid skin irritation. In addition, patients should drink plenty of warm water. For patients whose physical cooling effect is not good, it is recommended to lower the temperature through drugs. 2. Drug cooling: suitable for patients with high body temperature. Generally patients take fever-reducing drugs or intramuscular injection of fever-reducing injection, about one hour can have the effect. But the patient must be under the guidance of the doctor to use drugs. Fever-reducing drugs include ibuprofen as well as other antipyretic and analgesic drugs. With standardized treatment, most patients’ temperatures can be brought down to within the normal range. Fever reduction is only a symptomatic treatment, it is recommended that patients seek medical attention to find the cause of the fever, targeted treatment, to avoid missing the best treatment time.