A Answers (1)
Mehmet Oz, MD, Cardiology, answeredEach of the hair follicles on your body is connected to glands that secrete an oily substance to lubricate your skin and hair. The oily substance, called sebum, moves up the hair shaft and out the follicle. Pimples can form if the opening becomes blocked. Watch the animation to learn more about sebum and your skin.