Some adults carry scars from acne. Some relatively aggressive surgical procedures can improve scars. Procedures include dermabrasion , several types of lasers, injections under the skin called "fillers," and chemical peeling. These procedures remove the scarred surface and expose unblemished skin layers. Dermatologists also occasionally use glycolic acid and other chemical peels to loosen blackheads and decrease pimples. Microdermabrasion has little effect on acne itself, but is effective in combination with lasers.. Before considering such treatment it is important to discuss the procedures, necessary precautions, and likely results with a doctor.