Thank you for reaching out. It's not uncommon to experience redness and some residual effects after CO2 laser treatment. However, if you are still experiencing redness three months after your treatment, it may be worth getting a second opinion to make sure that everything is healing as it should be. The square pattern you mention may be a result of the laser treatment, and it's possible that it could take longer for the redness to fully subside in this area. It's important to follow up with your dermatologist or plastic surgeon to ensure that your skin is healing properly and to address any concerns you may have. It's also worth noting that redness can be a sign of ongoing inflammation or irritation, which could indicate that your skin is not healing as quickly or effectively as it should be. Your doctor may be able to recommend additional treatments or skincare products to help soothe and calm your skin, such as topical creams or ointments. In some cases, further laser treatments may be necessary to address persistent redness or other issues following CO2 laser resurfacing. However, this is something that should be determined on a case-by-case basis, based on an individual's specific needs and concerns. If you're still experiencing redness three months after your CO2 laser treatment and are concerned about the results, I would recommend scheduling a follow-up appointment with your doctor to discuss your options and get their professional opinion on the best course of action moving forward.