A closeup, HD, photo of the chin would be extremely helpful. From what I can discern, there appears to many of a special kind of relatively recently described, elevated acne scar, known as a "papular acne scars." If this is the case, the scar may be flattened by the use of intralesional triamcinolone, an anti-inflammatory agent, either alone or, if necessary, in combination with other injectable anti-inflammatory agents along, if still necessary, with "scalpel sculpting" to remove the elevated portions of the scars or electrodessication to flatten them. You would do well to consult with a board certified cosmetic dermatologist who will be able to diagnose and treat your problem. Best of luck.