Cause in adolescnese is increase generally in male sex harmones of male, people of both genders during puberty. Upper arms can have acne, but the lesions found that often there are keratosis pilaris. Typical acne lesions are inflammatory papules, comedones, nodules and pustules. Upper neck and face are most commonly affected, back, chest and the shoulders may have also have. Upper arms can have acne; lesions found that there are often keratisis pilaris.

Aggressive and early treatment is advocated before by some lessen overall impact to the individual terminology. Acne develops result of blockages in the follicles, formation and hyperkeratinization of plug of subum keratin is earliest change.

Root causes of some people gets acne and some are not known fully. It is known to be hereditary partly. Several factors are known as acne. Tendency to develop acne runs in the families, such as school-age boy with acne have often other member in family with acne as well.

Skin irritation, inflammation or scratching of sort will active the inflammation. Popular belief is that consumption of chocolates can cause acne; it is not supported by the scientific studies. Various studies, discussed, point not to the chocolate, high glycemic nature of foods containing simple carbohydrates as cause of acne.