Most acne scars are atrophic, meaning they leave a dent or deep hole on the skin. Boxcar scars are broad depressions with sharply defined borders, while rolling scars have smoother, sloping edges. Ice pick scars are narrow, pitted cavities that resemble pinholes. Atrophic scarring gives the skin a contoured appearance, sometimes referred to as rolling scars. Raised, or hypertrophic, acne scars are more common on the back and chest.
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