How does your body decide how much something hurts? Why might skinning your elbow, banging it into a wall, or getting stung there by a bee all hurt different amounts if none of them leave lasting damage and are in the same place?
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The type of damage is quite different.
Skinning your elbow breaks the skin, sometimes that bares nerve endings to the air. Banging it into the wall put a lot of instant pressure on the nerves, but they stay intact and in place. Bee stings are accompanied by poison which can spread slightly through your arm.
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