Hi, I'm guessing your question is pertaining to the management of facial scarring, such as old acne scars. Subcision is a well established method of breaking up old scar in order to stimulate new collagen growth with the hope of remodeling to restore smoother skin. Alternatively, lasers have been used to achieve the same thing. A newer, more advanced method that is growing amongst plastic surgeons is facial resurfacing using J-plasma Facial Rejuvenation. This treatment results in a deep peel of the superficial epidermis, followed by tightening of the underlying dermis. Lines and wrinkles significantly improve. Similar results can be achieved for old scarring as well. Seek out a surgeon that offers this alternative and have a consultation. I wish you the best!