What are clinical manifestatiosn of acne vulgaris?

• DURATION OF LESIONS: weeks to months • SEASON: often worse in fall and winter • SYMPTOMS: Pain in lesions (especially the nodulocystic type) • SKIN LESIONS: - Comedones—open (blackheads) or closed (whiteheads); comedonal acne - Papules and papulopustules—a papule topped by a pustule; papulopustular acne - Nodules/cysts ; 1-4 cm from repeated follicle rupture and inflammation, abscess formation - Sinuses : draining epitheliallined tracts, scars atrophic depressed or hypertrophic