What are these marks from? Acne? It's hard to say...in my experience, if they are acne scars they may fill in a bit, but won't fill in entirely. I got my first acne scar this year (at 24) and it did not fill in but it is subtle and gets more subtle with time. Most peoples scars don't fill in but look more subtle with time . Try derma rolling. It seems to work. Update us on whether your scars filled in naturally