If you cut your finger with an object such as a knife, it may still hurt less than a cut caused by a measly piece of paper. That’s because a knife is a straight edge that will make a relatively clean cut, while paper can bend and move in ways that cause a jagged cut with more damage on the surface of the skin. The shallowness of paper cuts also works to your disadvantage. Paper cuts tend to bleed very little or not at all, so there will be no blood clot that forms to protect the skin underneath. This means that nerves around the cut are more readily exposed to irritants, causing the cut to hurt longer. - Memd.
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