Acne vulgaris is an inflammatory disease of hair follicles caused by increased sebum production activated by hormones. Bacteria in hair follicles react with sebum to produce fatty acids that trigger inflammation and combine with keratin to form plugs. Symptoms include whiteheads, blackheads, papules, pustules, nodules and cysts on the face, back and shoulders. Treatment aims to reduce bacteria, sebum production, plugging and inflammation while preventing infection and scarring. Topical treatments include benzoyl peroxide and antibiotics while oral treatments include antibiotics and retinoids. Nursing care involves administering medications, educating patients, and monitoring for side effects and compliance.