That's a great question and the good news is that scar age doesn't necessarily rule out treatment. Even older scars can respond to modern treatment methods, though newer scars sometimes respond faster. The treatability really depends more on the scar type, location, and your skin's characteristics. Different scars require different approaches - discolored flat scars might need different treatment than raised scars. A professional assessment would look at all these factors. Technology has advanced to the point where even scars that were considered permanent years ago now have viable treatment options.