Is there a term from the field of dermatology and cosmetics that you do not understand? Would you like to know what it means? View the full definition from the La Roche-Posay glossary.

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Acne is a form of chronic inflammatory dermatitis of the pilosebaceous canal. Two types of lesion are linked to acne: retentional lesions (blackheads or microcysts) and inflammatory lesions (papules, pustules, nodules or nodular cysts). The most common scenario is that both types of lesion coexist: it is known as mixed acne.

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