Why do we instinctively want to rub/touch a bruise but not a cut?

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Whenever we get a bruise, we instinctively want to rub/touch it. When we get a cut, it stings so we don’t want *anything* to touch it.
Why do we want to rub/touch a bruise but not a cut? They’re both injuries but what makes them so different?

In: Biology
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It’s an irregularity. It’s the same reason we peel stickers off counters for no reason. Your body is so used to your skin feeling like skin that when you bruise or get a cut, it’s an irregular feeling and your mind gets subconsciously curious.

simply, because it only took us touching a cut once to learn it hurts more to touch it and to NOT want to do it again.