The bane of a teenager's life and among the most common skin conditions. acne vulgaris, is far from superficial. Rather, deep within tire skin, four key elements are at play: androgens activate the sebaceous gland to overproduce oil} sebum; dead skin cells lining the pores don't shed properly, clogging up the hair follicle opening; the commensal bacterium Propionibacterium acnes proliferates; and immune chemicals are released causing inflammation On the skin's surface. blackheads and whiteheads (comedones) papules (pimples) and pus tilled spots (pustules) erupt (see figure 1).
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