eli5. What’s with the instinctual head rub we do when we bump our head?
In: Biology
Blood rushes to the impact site which causes swelling in the capillaries and vessels in order to begin the healing process. This will cause further discomfort once the “speed knot” forms. Rubbing has the intention of keeping the blood from rushing in and causing edema/swelling, this shortening the overall time of discomfort/pain.
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