Acne is the name for those red bumps called pimples that a lot of kids and teens get on their skin. When your skin's oil glands make too much oil, the tiny holes on your skin called pores get stopped up with oil, dead skin, and bacteria. Then the skin around these clogged pores can swell and look lumpy or red. Usually, this happens during puberty, when your body is changing from a kid into an adult.
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2016 The Nemours Foundation/KidsHealth. All rights reserved.