From the photo, your indented, traumatic scar appears much like a chicken pox scar and can be treated like one. First, the indented (depressed, atrophic) portion needs to be elevated. This can be accomplished simply and inexpensively by the use of subcision lifting accompanied by the use of a biostimulatory filler that not only adds additional lift and support, but promotes new, native collagen and elastic fiber synthesis. Restylane Lyft is my go-to for the latter purpose in my Upper East Side Manhattan office and Hyaluronica 2 in my Israel satellite facility, where a far greater number of regulatory agency approved fillers are available. Next, I would perform a localized microneedling treatment using a Dermastamp in order to blend any residual surface color or texture irregularities with the surrounding normal skin. This, too, is a quick and relatively inexpensive procedure and can actually be performed (I routinely do this) immediately after the subcision during the same treatment session. Make sure that you seek consultation and treatment by a board certified aesthetic physician with expertise and experience in all forms of scar treatments and not just anyplace hawking the supposedly latest, "next big thing," one-size-fits-all to come along expensive fraxel laser, radiofrequency or ultrasound device. Best of luck to you.