An FDA-approved procedure for moderate acne vulgaris. Blue light therapy uses light in a specific wavelength (blue) to kill the bacteria that causes acne (propionibacteria acnes).
Blue light therapy can be used on its own, but is often combined with an agent that makes the skin more receptive to the light treatment.
The procedure itself is simple -- the client sits under the blue light for a few minutes. If a photosensitizing agent is used, it is applied prior to the blue light treatment. Several treatments are needed, usually spaced out over several weeks.
Side effects are mild swelling, redness, dryness, and temporary changes in skin color.
Blue light is often used after other treatments have been tried unsuccessfully. Many people find blue light improves acne, although not everyone sees results. Some studies have shown that nodulocystic acne may actually worsen after blue light treatments.
See also Phototherapy.
