It used to be thought when you had a fever the increase in body temperature was enough to destroy the pathogens in your body while not harming normal body cells. Now the prevailing idea is that in order to increase the body temperature enough to kill pathogens you would absolutely kill body cells as well. Which is why a high fever is such a bad thing. So why do we have fevers? It’s through this it actually opens things up in the body and gets the fluids moving faster. Really normally the body does this to try to remove the heat actually, however it also allows the body’s immune system to work better by allowing it to move around the body faster and with less obstacles to put it simply. So by having a hot shower you are sort of replicating this effect and heating up your whole system helping things get moving and reinvigorated.
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