High fever does not go down consider the cause of fever has not been removed, should be actively for the treatment of the cause, at the same time should be taken to reduce fever measures, common measures to reduce fever are physical cooling, antipyretic drugs. But there is no fastest way. 1. Physical cooling is the most commonly used and effective way to reduce fever, you can use ice packs on the neck, armpits, thigh roots and other superficial parts of the aorta. Without ice packs, you can use warm water to wipe the whole body with a damp towel, do not use cold water, because cold water will lead to vasoconstriction of the surface of the skin, which is more unfavorable to the dissipation of heat. 2. Antipyretic drugs: aniline, represented by acetaminophen; propionic acid, represented by ibuprofen. In addition, high fever should be appropriate amount of rehydration, whether drinking water or intravenous rehydration can be through a large number of urination to take away a large amount of heat, is conducive to cooling. High fever does not go away for a long time, usually is the body has a serious infection or pathological state of the performance, must go to the hospital in time for relevant examination, so as not to delay the condition.