Scar revision is the surgical or non-surgical treatment of a scar that has already healed. Every full-thickness wound leaves one, so the goal is never blank skin. The goal is a scar that is flatter, narrower, closer to the surrounding skin tone, lying along a natural skin line rather than across one, and — for a contracture — no longer restricting movement.
Surgical scar removal, in the sense the phrase is usually searched, does not exist: cutting a scar out creates a new wound, and that wound heals into a new scar. What a plastic surgeon can influence is where the scar sits, how much tension it heals under, how it is closed in layers, and what is done for months afterwards to keep it thin. Where a scar is wide, thick, or pulling, the improvement tends to be substantial. Where it is already fine and flat and the complaint is mainly colour, surgery adds little and is not offered.