Acne refers to a group of skin rashes that have different causes. Generally, in preteens and teens it is an inflammatory disease of the skin.
Acne lesions are often referred to as pimples or zits. If you're a preteen, chances are pretty good that you have started to experience acne.
Almost 8 in 10 teens have acne, along with many adults. In fact, acne is so common that it's considered a normal part of puberty.