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.

After Herpes Zoster, it is common to be left with dark marks (post-inflammatory hyperpigmentation), especially if the area was scratched, and these usually fade gradually with proper care. Treatment focuses on lightening the pigmentation and improving skin healing using creams such as Azelaic Acid or Niacinamide, and sometimes mild retinoids may be added by a doctor to speed up skin renewal. Daily use of sunscreen is very important to prevent further darkening, even on the nose. Avoid picking or irritating the area, and keep the skin moisturised. If the marks are persistent or deeper, dermatological procedures like chemical peels or laser treatment may be considered. With consistent care, most of these marks improve significantly over time.