Why can your body stop the bleeding from a small cut over the course of a few minutes, but bruises can continue to develop and worsen over the course of a few days?
In: Biology
What you’re seeing isn’t the bruise getting worse but the blood spreading out. When you get a cut say on your finger, the blood leaves your body and the wound closes. A bruise is a localized, internal bleed, so even after the capillaries close off, there’s nowhere for the blood that’s already leaked out to go, so it spreads out in the surrounding tissue until your body clears it.
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