Ice bag cooling is a kind of physical cooling, which is the fastest way and method of acute central hyperthermia in the emergency department, and the sites of cooling are the forehead, bilateral temples or the common carotid artery. Here are evaporation, heat dissipation is more obvious and capillaries are more developed zone, you can place ice bags, in addition, you can also place ice bags in the occipital area and the upper frontal part of the skull. Torso ice pack cooling sites are usually in the palms and feet, as well as the bilateral inguinal area can also be cooled by ice packs. Here the aorta is relatively well developed, the femoral artery is relatively thick arteries in the human body, its beating will evaporate and dissipate excessive heat, so the ice pack cooling in the lower extremities, femoral artery and groin position, can play a better cooling effect.