system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does body temperature fluctuate so much when sleeping?

When I go to bed I'm a normal temperature, i often wake up in the middle of the night drenched in sweat, and then I wake up in the morning and I'm freezing. Bonus points if you can tell me how to skip the sweating part!!
gpt
It's not normal to wake up drenched in sweat. It's not necessarily a sign that anything is wrong either, but if you have ruled out things like having the heat up too high, too thick of a blanket, etc. then it might be worthwhile to get checked out by a doctor. Thyroid and hormone problems, among many others, can cause this.