Which method is commonly used to treat acne scars through controlled injury?

Microneedling is a method that effectively treats acne scars by creating controlled micro-injuries to the skin's surface. This technique encourages the body’s natural healing processes, stimulating collagen and elastin production, which helps improve the texture and appearance of scars over time. The tiny needles used during the procedure penetrate the skin, provoking a response without causing significant damage, making it a minimally invasive option.

While other methods like chemical peeling and laser resurfacing also target skin issues, their mechanisms differ from microneedling. Chemical peeling involves the application of chemical agents to exfoliate the skin, and laser resurfacing uses laser technology to remove layers of skin. Both can be effective for scar treatment but carry different risks and recovery times compared to microneedling. Ultrasound therapy, on the other hand, primarily focuses on skin tightening and rejuvenation rather than the specific treatment of acne scars. This distinction highlights why microneedling stands out for the controlled injury it inflicts to promote healing and scar improvement.