system
Given the following post, respond as if you're commenting on Reddit:
human
If your body temperature drops while you sleep, why do you often wake up in sweat?

Are the two related?
gpt
The exactly same (opposite) thing happens when you have a fever- Your body raises its temperature to kill bugs that are infecting you, and the sensation is that you have chills.  It might be related to temperature relativity, in that since your body temp becomes a bit lower, the ambient temperature of the room is perceived as a bit warmer than usual.  The two main reasons for sweating are from either your hypothalamus trying to lower body temperature, or a sympathetic response on sweat gland acetylcholine receptors.