No sweating will also reduce fever, but the magnitude of fever reduction is relatively slow. The principle of fever is that the central body temperature regulating point of the human body is moved up, and the self-defense and protection of body temperature reduction is achieved by heat dissipation. There will be no sweating, but automatic anti-inflammatory or antiviral, anti-pathogenic microorganism results in clinical not sweating but will reduce the fever. In this case, although the fever is reduced, if the amount of medication used is not enough or the effect of medication is not enough, the maintenance time is not enough and the fever may return after the fever is reduced.