what causes gooseflesh
I get them in cold weather but also in a jacuzzi. A. Goose bumps are caused by the contraction of the tiny arrectores pilorum muscles attached to hair follicles, according to Dr. Allan L. Lorincz, a dermatologist at the University of Chicago. The contraction of these muscles is dependent on the activation of the inner nerves known as the autonomic nerve supply. Because this nerve supply is stimulated in part by temperature, goose bumps (also known as gooseflesh or goose pimples) commonly appear when the body is chilled or superheated. Fear, sound or any other stimulus that activates the nervous supply can also cause the arrector pilorum muscle to contract.