[voice over] My mother always used to say that you could tell the difference between an intern and a second-year resident by their sutures. One of the more common mistakes an intern makes is tying their sutures too tightly, which causes tension. The more tension, the longer it takes the wound to heal. It decreases blood flow, increases scar formation, and even necroses the skin. So even though they may have technically closed the wound they may have opened the door to even more problems.
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