system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are you cold and sweat at the same time when you are nervous?

When I am nervous I normaly tend to sweat a lot but at the same time I am freezing. I would like to know what is the process that the human body does to reach this situation and how common this might be.
gpt
you get an adrenaline rush, adrenaline makes your body go into fight or flight mode.
it pulls blood to more important places. you become cold in your hands and feet where it narrows arteries. your glucose processing goes into overdrive to create more energy for the muscles. adrenaline also makes your sweat glands go into overdrive. makes your face become red from the extra blood, makes it very hard to sleep and makes it very hard to eat because blood has been pulled away from your digestion.
afterwards you get to have a nice low blood sugar crash.