Acne is a disorder that results in blocked pores that are commonly called pimples. It is caused by the actions of hormones and other substances on the body’s hair follicles and sebaceous (oil-producing glands). Acne commonly occurs on the face but it is also found on the neck, chest, back or shoulders. Treatments include over the counter or prescription medication, skin treatments such as cleansers and lotions, herbal medicine, vitamin supplements, massage and stress reduction techniques.