It is done in three to five sessions at three to four week intervals. Scar floors rise and pores tighten as sessions add up, because new collagen forms while the microscopic stimulus created inside the skin heals. Deeper scars call for more sessions.

Redness can last two to three days. It does not burn and peel the surface, so no scab forms and you can wear make-up from the next day. It creates stimulus only inside while leaving the surface almost undamaged, so recovery is fast; sun protection is essential.

The depression becomes shallower and the texture evens out, but it does not disappear completely, because a scar is tissue that has already changed and cannot be returned to original skin. Tethered scars are pulled down by fibrous bands, so combining subcision to cut those bands widens the improvement.