Even though it's usually associated with teens it does in fact affect adults too. And it doesn't discriminate - men and women are affected almost equally and it occurs in every race.

The full name for acne is Acne Vulgaris. The visible symptoms are lesions that break out on the skin. These lesions may be whiteheads, blackheads or cysts which are formed out of clogged pores.

Teenagers are most commonly affected because their bodies produce a larger amount of sebum - an oily substance that helps keep skin and hair soft and lubricated. Because it is often overproduced during puberty, it can lead to clogged pores. It also sometimes leaves the skin feeling oily to the touch.

Another change during puberty that can result in acne is a higher production of follicle cells. As these cells die, they can build up quite quickly and when combined with sebum, they'll lead to whiteheads.

When the two are mixed together, they form a perfect breeding ground for bacteria which ultimately ends up in the swelling and redness common to acne.

Roughly 85% of people from 12 to 24 years old are affected by acne. About 25% of those people develop acne in places other than their face, usually their neck and back. 40% of the people who deal with acne wind up seeking medical treatment to help with serious outbreaks.

The most common area that is affected by acne is what is known as the "T Zone" on the face. This is made up of the forehead, nose and chin. Acne does form on other facial areas however, such as the cheeks.

The back is the second most common area to be affected, followed by the chest, shoulders and neck.

Most people's acne clears up by the time they are in their 20's but in some cases it can continue throughout adulthood. Some people even have the first appearance after they are adults.