What exactly makes you hot during a fever, and what is happening when a fever “breaks”? Why do you not sweat during the fever but do sweat when it breaks?
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When you have a fever your body is using a lot more energy to produce more white blood cells and more anti-bodies. That process creates heat which is why your body temperature rises but if it stays elevated for too long it will damage parts of your body which is why you normally sweat. However you don’t sweat when you have a fever because your body doesn’t want to slow down production of white blood cells or antibodies yet. When your fever breaks your body determines that it doesn’t need to produce so many white blood cells or antibodies anymore so it will begin the process to cool itself back down to average body temperature meaning you start sweating again.
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