Anyone?

i've got some bumps like that on my chin and my derms have told me its raised scarring. cant figure out why they just came on all of a sudden over 3 years ago.

i've had 5 laser treatments (erbium, co2 & fraxel restore dual) on them as well as microderm, peels, ipl, electrocautery, etc and nothing works on them. i am planning on going to nyc sometime in the next month or two to have manual dermabrasion done on them i hope it works if not i am out of ideas.