why swelling occurs while walking after having a knee injury

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why swelling occurs while walking after having a knee injury

In: Biology

Necrosis occurs to injured tissues of your knee; the cells composing theses tissues release their innards and the adjacent healthy cells freak-out and release chemical messengers called cytokins that recruit your immune system to clean up the mess–this is the inflammatory response.

Part of the response sees the dilation of blood vessels that facilitates the repair process by allowing more blood flow to the injured area. This is important because more blood brings more nutrients and if we’re talking about a closed wound, then the immune system has extra work to do by removing all of the dead tissues and parts there of as well as filtering the blood that accumulates during swelling.

TL;DR: increased blood flow promotes the repair process by removing dead tissues and supplying new materials for the healthy tissues to regenerate anything damaged during the injury.