Acne is a condition of the skin that shows up as different types of bumps. These bumps can be blackheads, whiteheads, pimples, and cysts. The type of acne that a lot of teens get is called acne vulgaris. It usually shows up on the face, neck, shoulders, upper back, and chest. These glands make sebum , which is an oil that lubricates your hair and skin.
Teens get acne because of all the hormones that come with puberty.
Most of the time, the sebaceous glands make the right amount of sebum. As a teen's body begins to mature and develop, hormones stimulate the sebaceous glands to make more sebum, and the glands may become overactive. Pores become clogged if there is too much sebum and too many dead skin cells. Bacteria can then get trapped inside the pores and multiply, causing swelling and redness - the start of acne. If a pore gets clogged up and closes but bulges out from the skin, you're left with a whitehead .