If a pressed scar has not moved after several lasers, bands may be the cause.
When deep acne heals, tough bands form linking the surface to the layers below, and these pull the surface down into a depression. Passing a fine needle beneath the scar in a fanning motion releases the bands so the pressed skin rises. New collagen fills the space. It suits the pressed, rolling and boxcar scar types.
It is done three or more times at intervals of four weeks or more. Depressed skin rises over one to three months, which is how long it takes for the released area to fill with new collagen. Keeping the interval stops bruising and swelling from stacking and gives tissue time to recover.