Acne
Description
- Chronic inflammatory disease of the pilosebaceous unit - comedones (open/closed), papules, pustules, nodules/cysts in severe disease
- Graded mild / moderate / severe by lesion count, inflammation, and scarring risk - drives treatment intensity
- Distinguish from acne as a sign of systemic disease (sudden severe onset, virilisation, drug-induced) - see cutaneous manifestations of systemic diseases for that angle
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