Why do people get goosebumps?

Our body is hairy and goosebumps have a lot to do with hair, muscles and skin. All over your body, you have tons of small hair. And underneath the skin, there are tiny muscles attached to the ase of these hairs. You get goosebumps when these tiny muscles pull the hairs until they are standing straight up at attention and your skin bunches together into little bumps. Generally, you get goosebumps when you are colds but sometimes you can get them when you are frightened or something gives you ‘the chills’