Microneedling is one and yes lasers work, even the lasers that remove tattoos play a role.

Tattoo removing lasers “pico” blow up the the dark pigment in the skin that is then absorbed and passed out as waste.

You can also remove a unwanted scarring from a bad incision so to create a more favorable one that will be easier to hide/remove.

If you’re prone to keloid scarring then you are very limited in what you can do. I know I wouldn’t blast one of those with a pico laser!