Fever is one of the most common symptoms of a viral cold, and the need for cooling is chosen based on the temperature. Generally speaking, if the body temperature is not very high, not more than 38 degrees in the family, may not be given to reduce the heat, because the appropriate fever is conducive to the activation of the immune system, so as to more quickly clear the virus and promote the healing of the disease. However, if the body temperature exceeds 38 degrees, or if it does not exceed 38 degrees, but is accompanied by severe headache, general malaise and other obvious symptoms, the treatment can also be administered. Physical cooling is a safe and effective way, the specific method can be used warm water bath, with a wet towel to wipe the forehead, neck, armpits, legs and other parts of the blood vessels, the use of water evaporation to take away the body temperature of the way to cool, warm water can be added to the appropriate amount of alcohol, so that the effect is more obvious. You can also bring your own ice bag, placed in the neck, armpits and other parts, if it is placed in the neck, note that you can not put the bilateral neck, to avoid compression of blood vessels caused by head ischemia. In addition, if the body temperature is repeatedly increased after physical cooling, or accompanied by obvious symptoms of discomfort, you should go to the hospital as soon as possible to avoid delaying the condition.