Studies show that lasers and other light treatments can reduce acne. Rarely can these treatments alone clear acne. Right now, there’s no way to know who will see clearer skin and how much the skin will clear when treated with a laser or other light treatment. Several studies have shown that multiple treatments deliver significantly better results than a single treatment. In studies, researchers continually find that patients see the best results weeks after the last treatment. In one study, patients treated with a type of light therapy had 50% fewer spots at the end of the 4-week treatment period. Twelve weeks after the last treatment, they had a 72% reduction.
Results from lasers and light therapies are generally long lasting. Redness and swelling are common after treatment with many lasers and light treatments. Some patients say their skin stings or burns. These are usually mild and disappear within a few hours or by the next day.