Punch grafting is an effective way of treating pitted acne scars. It involves the surgical excision of the scar and surrounding tissues with a punch biopsy tool of equal or slightly greater diameter. After the scar is removed, the physician will fill the opening with a skin graft from a donor site (usually from behind the ear). The graft is taped or glued into place. In effect, this procedure transforms a round indented scar into an area of smooth even skin. In some cases, there may be some noticeable unevenness, which can be later corrected by using chemical peels or microdermabrasion 4 to 6 weeks after the skin has healed.