Patients with fever can use ice packs for cooling, which is often referred to as a physical cooling method. The principle of using ice bags for physical cooling is that the patient’s local body temperature can drop through heat transfer after using the ice bag, so that the patient’s body temperature and the ice bag to re-establish a new thermal equilibrium between the patient’s body temperature, can make the patient’s body temperature than before the gradual decline. Commonly used physical cooling methods, you can also use warm water or diluted alcohol for whole-body rubbing, the purpose is to make the patient accelerate the heat dissipation on the skin surface, so that the patient’s heat can be distributed to achieve the purpose of cooling. Medications are used to reduce heat and treat the patient only if he or she has a high or ultra-high fever. Therefore, patients at different temperature levels can use different methods of home remedies for decompression heat treatment and therapy.