The best way to fix them: This is where the classic zit treatments come into play. "Topical medications are the best way to treat a lesion like this," says Jennifer Chwalek, M.D., a dermatologist at Union Square Laser Dermatology in NYC. "Benzoyl peroxide-, salicylic acid-, or sulfur-based products can help to dry it up." She prefers salicylic acid over benzoyl peroxide for these, since the latter can cause irritation, dryness, and even post-inflammatory hyperpigmentation (a.k.a. dark spots) in those with darker skin tones. Retinol works well for these, too.
No one factor causes acne. Acne occurs when sebaceous (oil) glands attached to the hair follicles are stimulated at the time of puberty or due to other hormonal changes. Sebum (oil) is a natural substance that lubricates and protects the skin. Associated with increased oil production is a change in the manner in which the skin cells mature, predisposing them to plug the follicular pore. The plug can appear as a whitehead if it is covered by a thin layer of skin, or if exposed to the air, the darker exposed portion of the plug is called a "blackhead." The plugged hair follicle gradually enlarges, producing a bump. As the follicle enlarges, the wall may rupture, allowing irritating substances and normal skin bacteria access into the deeper layers of the skin, ultimately producing inflammation. Inflammation near the skin's surface produces a pustule; deeper inflammation results in a papule (pimple); if the inflammation is deeper still, it forms a cyst.
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