Male hormones stimulate the production of keratin and selubum, which leads to clogged pores.
Therefore the condition is more common in adolescent males. During puberty, androgens increase in both sexes, making females susceptible as well. Acne also is linked to the ingestion of oral contraceptives high in progesterone content. Glands located in each hair follicle produce oil that lubricates the skin. Sebaceous glands are concentrated on the face, back, chest and shoulders.