Acne affects teens and adults of all ages. It happens when oil secreted by sebaceous glands clogs the hair follicle. Bacteria infect the clogged follicle and cause pimples.

Acne is a disorder of the hair follicles and sebaceous glands. Hair follicles are the areas around the base or root of each hair. Sebaceous glands are the tiny glands that release oil (sebum) into the hair follicles. The sebum moistens the skin and hair. The sebum and hair get to the skin surface through tiny holes called pores.

Learn about what adult acne is, what causes it, and how it's treated.

Acne is a skin condition that causes blemishes on the face, back, chest, or upper arms. In time, your acne may go away by itself. But treatment can help to control your acne now.

Baby acne (neonatal acne) is a skin condition that affects about 2 out of 10 newborns. It occurs when a baby is about 2 to 6 weeks old.

You stand the best chance of controlling your acne if you follow your treatment plan. Acne often takes months to improve, not days or weeks.

Your acne treatment will work best if you follow your treatment plan. Acne often takes months to improve, so you will need to be patient.

Learn about acne with this multiple-choice quiz. You'll learn, for example, which factors promote blackheads.

Watch this video to learn three things you can do to help with your acne.

For many people, pregnancy brings glowing skin, rosy cheeks, and shiny hair. But others can experience skin changes that aren't so attractive, including acne, dark spots, and stretch marks. Read on to learn more.

Your child has reached the stage of adolescence called puberty. During this stage, your child’s body begins to develop and become sexually mature. This sheet tells you what to expect during this stage of your child’s growth and development.

PCOS is a common hormone problem in women of childbearing age. Women with PCOS may not ovulate, and have abnormal hormone levels. They may experience missed or irregular periods, excess hair growth and weight gain around the belly.

Your child has reached the stage of adolescence called puberty. During this stage, your child’s body begins to develop and gain sexual maturity. This sheet tells you what to expect during this stage of your child’s growth and development.

This stage of your life is when you change from a girl into a young woman. Puberty will last a few years. During puberty, your body will go through changes. And your feelings may take you on a roller coaster ride.