Your body has a process called homeostasis. Every single part of your body works to keep itself at a constant level. The temperature of the human body is ~37 degrees celsius. When we go above that (get too hot) we become uncomfortable because our brain is trying to tell us to cool down. The opposite is true when it is too cold, as our body tries to warm up. That’s why people get red faces on cold days, as the body sends more blood to the surface in an attempt to warm us up
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