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Results 1 - 3 of 3 for acne vulgaris OR "comedones," open
  1. Blackheads, or open comedones, are common in acne. Clogged hair follicles reflect light irregularly to produce this black hue.
  2. Blackheads, or open comedones, are common in acne. Clogged hair follicles reflect light irregularly to produce this black hue.
  3. ... 6 millimeter wide erythematous (red) pustules with large open and closed comedones. Permanent scarring may follow a severe case of acne. Men are more often affected on their shoulders ...