- The true cause is often unknown. Androgens (hormones) tend to trigger acne in those predisposed.
- There are several reasons that teenagers get acne:
- Hormonal changes cause an increase in facial oils (a secretion called sebum) and allow increased growth of a bacterium, Propionibacterium acnes.
- Facial oil and dead skin cells clog oil-secreting pores, causing skin irritation and inflammation.
- Two types of Pimples (comedones) -- open and closed:
- Open comedones, or "blackheads," are less severe and are more easily treated.
- Closed comedones, or "whiteheads," are more severe and more difficult to treat. They also are more likely to lead to development of cysts.
- Pustules and cysts are collections of infectious pus, fluid, and dead skin cells. They are most likely to cause permanent changes and scarring.
- Plugging of hair follicles by a protein known as keratin causes the formation of so-called whiteheads and blackheads, which form when the plugged sebaceous glands within the hair follicles continue to secret sebum (an oily secretion). Sebum and skin cells cannot exit, thus accumulating in mass, causing the follicle to swell. If the swelling continues, it may rupture, allowing the surface bacteria (normally found on the skin) to enter and cause local infections (e.g., zits or Pimples). The zits may then enlarge and form cysts.
- Irritating creams and oils
- Topical steroid creams
- Corticosteroid medication taken orally
- Adolescence, male sex, certain drugs (e.g., Dilantin, steroids), humid/hot weather, supplements (e.g., DHEA), and constant skin friction (e.g., use of motorcycle helmets, telephones) are some of the common risk factors.
|