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Common skin condition affecting hair follicles and sebaceous glands; lesions (spots) occur mainly on forehead, nose, chin, upper chest and back. Characterised by blackheads or comedones (dilated pores with black plug of keratin); whiteheads (small, cream-coloured, domed papules); red papules; pustules; sometimes cysts. Inflammation occurs when Proprionbacterium acnes bacteria colonise blocked pores. Severity is classified as follows:
Acne is induced by androgens, which may explain its prevalence in the teenage years. Can occur up to the 5th decade of life. May severely affect quality of life.
Acne is also a characteristic sign in polycystic ovary syndrome.
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Practice in Pictures - Acne Dr Mike Wyndham
NICE NG198. Acne vulgaris: management; June 2021 https://www.nice.org.uk/guidance/ng198
NICE Clinical Knowledge Summaries. Acne vulgaris; last updated 2020 https://cks.nice.org.uk/topics/acne-vulgaris/
DermNet NZ. Acne and other follicular disorders https://www.dermnetnz.org/topics/acne-and-other-follicular-disorders/