When you don’t have a fever, applying a fever reducer will not have a significant effect on your body, although there is no obvious harm. Fever patches are made up of gel, and the water in the gel will vaporize during use so that the heat in the body will evaporate, taking away excess heat from the body through evaporation, thus having a certain effect on colds, fevers and infections. The cooling of the fever patch belongs to a kind of physical cooling, the composition of the fever patch is mainly the gel layer of the drug, anti-adhesive layer and backing layer three layers, but if the body temperature is not high, paste the fever patch does not play the role of physical fever and physical cooling, so paste the fever patch is not beneficial to the body and there is no obvious effect, although it can not cause some harm to the body, but paste the fever patch does not play the role of physical evaporation, so it is a waste. The effect is a waste.