First, it must be emphasized that there is currently no procedure or device available that can totally erase any scar from any cause, including trauma, once it has fully matured (is beyond three months old). Fortunately, however, subcision, which is a quick, simple and relatively inexpensive technique that engenders little to no downtime can work well for elevating and smoothing depressed (indented, atrophic) scars. Requiring only a little local anesthesia, subcision works by breaking up the downwardly pulling, tethering fibers of scar collagen that are responsible for the indentation, which in turn stimulates new, native collagen and elastic fiber synthesis. I would be reluctant to recommend excision of the scar, since the nose is under particular tension, and this may result in a stretch scar. Best to see a board certified aesthetic physician. Best of luck.