Why do we (usually) feel no pain while we’re sleeping?

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Usually, when someone has a stomachache or a headache, they don’t feel it when they’re sleeping. When they wake up, they feel it again.

EDIT: Maybe i’m just a heavy sleeper lol

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18 Answers

Anonymous 0 Comments

I think the other responses so far completely misunderstand the question at hand. Let me try to give an example of what I believe OP is really asking.

Suppose you are sleeping and you develop a stomach ache in the middle of the night. Your nerves are firing, the stomach is sending the signals, but the dreaming consciousness isn’t receiving it. You are on a dream adventure and there’s no semblance of stomach ache in your world, even though the nerves are firing and the brain is receiving.

If the pain gets bad, you will wake up, just like if someone slapped you. Your consciousness will only start knowing about the pain after waking up, at which point the pain is very apparent even though 10 seconds earlier there was no pain as far as the conscious part of you could tell while on that dream adventure.

So why is it that there is apparently an on/off switch for the conscious feeling of pain? I think that is OPs question. It’s not about how nerves behave.

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