Acne is a pretty common skin disease that results in scaly red skin, whiteheads and blackheads, pimples, and pinheads, often accompanied with scarring. The face, upper chest and the back are the most commonly affected areas with acne. In most of the cases, acne sets in during adolescence and may even carry on into adulthood.

Increase in testosterone levels in the body during adolescence is the major culprit behind acne. Acne starts diminishing with age and in majority of individuals acne disappears by the age of 25. However, one can never predict by what age acne will disappear completely. Some individuals are known to carry the disease in their thirties and forties.