Several types of laser and light treatments can make scars (including acne scars) less noticeable. Laser treatments use a particular wavelength of light to cause a particular action in the skin. Sometimes the scars remain pink or red because the new blood vessels that developed to heal the wound never receded once their job was done. A specific laser can cauterize the small vessels from the inside out to remove them from the scar and allow the pink or red color to fade.
This action may also help the scar flatten if it’s too thick or thicken if it is too thin. Other lasers can vaporize small columns of tissue within the scar to break up the collagen fibers and allow the scar to remodel and become more flexible. The treatments can also help with pain, itching and sensitivity. Laser treatments may cause hyperpigmentation (skin darkening) or hypopigmentation (skin lightening) in people who have dark skin. Talk to your healthcare provider about side effects before starting treatments.