How Lasers Affect Acne Scarring

Acne develops through a combination of excess sebum production, abnormal clogging of the pilosebaceous follicles, activity of Cutibacterium acnes, and inflammation. After a breakout resolves, it may leave behind textural scarring or persistent areas of discoloration. Laser and light-based therapies have been studied for both active acne and its lasting effects, although their mechanisms, supporting evidence, and appropriate uses differ by device.