eli5 Why does it hurt so much to move a body part that fell asleep
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It hurts for a similar reason amputees have phantom pain. The brain is attempting to send a signal through the nerves of the numbed area. If the brain is sending signals but not receiving any back, it’s not going to stop sending signals, it’s going to amplify them and send stronger signals. In turn, that amplifies whatever sensation the numbed area (and direct area around it) can feel.
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