Acne is the development of blackheads, whiteheads, pustules, or cysts. This skin condition is most common in teenagers, but can also occur in adults and children.
Dead skin cells and oils travel up to the surface of the skin through pores. Sometimes there is too much of an oil, called sebum. The extra sebum causes dead skin cells to stick together and block the pore. This is what causes acne. Bacteria can also become trapped in the pore and cause an infection. The infection causes the familiar redness and pus. It can also spread down into the skin and cause cysts.
Last reviewed November 2018 by
EBSCO Medical Review Board
Marcie L. Sidman, MD
Last Updated: 3/14/2017
EBSCO Information Services is fully accredited by URAC. URAC is an independent, nonprofit health care accrediting organization dedicated to promoting health care quality through accreditation, certification and commendation.
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
To send comments or feedback to our Editorial Team regarding the content please email us at email@example.com. Our Health Library Support team will respond to your email request within 2 business days.