What Causes Goose Bumps?

It's common logic that you get goose bumps when you are cold or scared... but do you know what causes goose bumps? Find out from...

It’s common knowledge that when a human is cold, they get goose bumps (usually on their arms). But do you know what causes goose bumps and what they are? Let me explain… Goose bumps, aka the “pilomotor reflex,” are part of an automatic response of a mammal’s body. Part of this reflex’s function is to generate warmth in a cold environment. “How does it work?” you ask. The muscle fiber attached to the hair follicle tightens and pulls the hair straight up, which makes the surrounding skin bunch up. The straightened hair traps a layer of air against the skin …

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