Young man in black-rimmed glasses with a serious face pimples, and reflection of laptop screen, close up. He’s a student suffering from problem skin. Most common cause of acne hormonal changes body. Teenage period is most vivid example. In a person’s life is period of greatest activity of hormones. Side of his nose closed comedones are visible is a whitish papules with a diameter of one to two mm. Closed comedones become inflamed often with formation of pustules and nodes of acne.