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- The appearances of skin lesions occur wherever there is numerous oil or sweat glands, mainly on the face, chest, and back. The typical acne lesions include comedones (whitehead, blackhead), papules (reddened, no pus), pustules (reddened, pus), nodules, and inflammatory cysts. These are the more inflamed form of pus-filled or reddish bumps, even boil-like tender swellings. Non-inflamed sebaceous cysts (also called epidermoid cysts) occur either in association with acne or alone but are not a constant feature. After resolution of acne lesions, prominent unsightly scars may remain.
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