Most teens develop a mild form of acne, called non-inflammatory acne, consisting of occasional blackheads, whiteheads, or pimples. Inflammatory acne is more serious and can occur in up to 40 percent of teens. It consists of constant outbreaks on the face, neck, chest, back, and upper extremities. Serious acne causes clogged pores to open up deep in the skin, forming large red cysts with pus. Acne is prevalent among teens because puberty plays a significant role in producing androgen.
Boys generate ten times more androgen than girls do, and are more likely to develop acne.
Scientists believe acne may be hereditary. Although people of all different races get acne, patterns, duration, and severity can vary among different ethnic groups. A popular misconception is that acne occurs from poor hygiene. Many think that a good scrubbing can help clear the skin. However, dirt or surface skin oils do not cause acne, and vigorous washings may irritate the skin instead.