How Does Fractional Laser Work on Acne Scars?
It places tiny columns of controlled heat in a regular pattern so surrounding healthy tissue drives repair and prompts collagen to reorganize.
Fractional laser treats only a fraction of the skin at a time, leaving untouched tissue in between. Those spared areas speed healing while the treated columns set off a repair response, which over several sessions encourages collagen to remodel and soften the look of indented acne scars.
Microthermal zones and repair
By creating microscopic thermal zones and sparing the tissue around them, the laser lets the skin recover faster than a fully resurfaced surface would. The repeated repair cycles gradually rebuild and realign collagen, which is what smooths the scar contour over time.
Downtime and pigment response differ between individuals, and darker skin can carry a higher risk of post-treatment darkening. Suitability and settings are best decided when you consult a specialist rather than assumed from before-and-after photos.
MediIndex articles are for general information only and are not medical advice, diagnosis, or advertising. Outcomes vary by individual — consult a board-certified specialist for personal decisions.