Alcohol can be used to physically cool the body. Adults who are physically cooled can choose warm water that is close to body temperature, or alcohol, which is preferably about the same temperature as body temperature. Alcohol is more likely to evaporate, and when it evaporates, it may take away heat, so it can achieve physical cooling effect, and it can also achieve such effect with warm water, so it can be used clinically. Alcohol is best not applied to infants and children because their skin is more delicate, and if alcohol is used to physically cool them, it may lead to skin damage. Because the amount of alcohol applied is relatively large, the fever may even absorb part of the alcohol, even if it can bring down the body temperature, but it increases the burden on the liver, and there may be other adverse reactions. Therefore, in clinical physical cooling with warm water is a more recommended way, and the application of alcohol for physical cooling is not recommended.