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Blackheads (open comedones)

Non-inflammatory

Plugged follicles open at the surface; the dark colour is oxidised sebum and keratin, not dirt. A non-inflammatory lesion.

Sources: NIAMS / NIH — Acne, StatPearls — Acne Vulgaris (NCBI NBK459173)

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Informational only — not a medical diagnosis. See the medical disclaimer.