by Melissa Goldberg Tue, Nov 10th 2009
When I heard that dermarolling may be a way to fix acne scars (and is a favorite treatment of stars like Angelina Jolie), I just had to play guinea pig. Derma rollers look like mini paint rollers, and are covered with tiny needles. When you roll it against your skin, you cause controlled trauma to the dermis with hundreds of little pricks.
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