2. External factors such as application of occlusive oils, pomades, mica or talc.
3. Dietary factors such as high carbohydrate or dairy intake.
Hormonal acne is exacerbated by the fluctuations in hormone levels and by the action of male hormones, called androgens, on the hair follicle. This stimulates the follicle to make sebum which backs up into comedones, pustules and in severe cases, cysts.