system
Given the following post, respond as if you're commenting on Reddit:
human
How can someone sleep on their arm and cut off the blood supply for 8+ hours without any injuries?

Also, if someone did this every night for years, would their arm still be fine?
gpt
When your arm goes numb you're not cutting off the blood supply, you're only pinching a nerve and stopping the impulses from getting through. Your arm isnt dead in the morning from sleeping on it all night in the same way a paraplegic's legs aren't dead from not feeling them.