Physical cooling methods for high fever include warm water cooling, hydration cooling and ice bag cooling. 1. Warm water cooling: When you have a high fever, you can use warm water to wipe the skin surface of the neck, armpit, elbow, groin and popliteal fossa where large blood vessels pass through, so as to evaporate the excess water on the surface of the skin and take away the excess heat in the body, thus achieving the purpose of lowering the temperature. 2. Hydration to lower the temperature: when you have a high fever at home, you can drink more boiled water, drinking water can promote blood circulation in the body, accelerate the discharge of viruses, but also through sweating, urination and other ways to achieve the purpose of lowering the body temperature. 3. Ice bag cooling: high fever, the towel can be wrapped up in an ice bag, placed in the body with large blood vessels exposed parts, to help dissipate heat, to achieve the purpose of cooling, pay attention to the ice bag can not be used directly, must be wrapped up and then used. If the patient has a high fever, the use of physical cooling is usually very little effect, such as temperature has not been relieved, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor for treatment.