Fractional CO? laser is an effective treatment for atrophic (depressed) scars, but like any procedure, it can have side effects, especially in people with brown or darker skin tones, where the risk of post-inflammatory hyperpigmentation is higher. Common side effects include redness, swelling, mild pain, and temporary darkening or lightening of the skin, which usually settle over days to weeks, while less common risks include infection, prolonged redness, or scarring if not done properly. The risk of hyperpigmentation can be reduced by proper skin preparation, using sunscreen strictly before and after the procedure, and following your dermatologist's advice, sometimes with pre- and post-treatment creams. Choosing an experienced dermatologist and using appropriate laser settings for your skin type is very important to minimise risks. Overall, when done carefully, the procedure is generally safe and can significantly improve scars, but it requires proper care and realistic expectations.

Stitch marks on the face that have been present for 4 years are mature scars, so they may not disappear completely, but can be significantly improved with the right treatment. Options include topical treatments like Silicone gel or creams containing retinoids to gradually smooth the skin, while dermatological procedures such as laser therapy, microneedling, or chemical peels can help improve texture and reduce visibility. In some cases, minor surgical revision may be considered for deep or irregular scars. Regular use of sunscreen is very important to prevent further darkening of the scar, and avoiding picking or irritation helps in better healing. The best approach depends on the type and depth of the scar, so consulting a dermatologist will help you choose the most effective and safe treatment plan for your skin.