Light therapy can reduce the amount of bacterial activity and inflammatory activity in the skin. Porphyrins are natural products of p acnes, the bacteria most commonly found in acne lesions. Exposure of the bacteria to blue light (405-420nm) causes the peroxidation and subsequent killing of bacteria. A minority of patients do not respond to this therapy. A low-fluenced pulsed-dye laser appears to be an effective treatment for inflammatory acne and can result in reduction of inflammation for up to twelve weeks after a single treatment. Adding near infra red light, promotes circulation and oxygenation of the tissue to accelerate healing. Light therapy can be boosted with a topical medication called Levulan ™, althought there is a greater likelihood of significant acne flaring, the clearing of inflammatory acne is overall accomplished more quickly. Acne scarring is treated with the 1064 laser.
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