Chill bumpssome people call them goose pimpleshappen to everyone. They are little raised bumpy places on your skin that get there when your skin is cold. This is a reflex action, one of the automatic actions your body does without thinking by your brain. In an animal with fur this helps to raise each of its hairs to fluff up its fur. Fluffed-up fur is a better insulator and helps keep the animal warm. For you it doesn't do much good. But it certainly is not anything to worry about either.