system
Given the following post, respond as if you're commenting on Reddit:
human
What happens to pain while you sleep?
gpt
When you go to sleep, a part of your Brain called the Reticular Formation decides what signals it should block out. This is the reason why when you lie in bed to sleep, you don't feel the sheets under your skin the whole time, as you do when you first sit down. This part of the Brain also controls what pain signals are sent to the Brain. So when you sleep, it blocks out regular signals that would disturb sleep.