Guidance: Hello, there are skin grafting, laser scar removal and other treatments for this kind of large-area burn scars plastic surgery, but the effect may not be very good. The medical history has been three years, and it is unlikely that the scar will deteriorate. Now it is suggested to use compound allantoin gel for external use, which may relieve symptoms and reduce scar hyperplasia. I hope it helps you. Good luck and all your wishes come true. Remember to comment. Thank you.