Blue light therapy is a noninvasive treatment for acne that uses light to kill certain bacteria on the skin.
A form of phototherapy, blue light treatments are FDA-approved for acne vulgaris that is moderate or has not responded to other therapies.
Blue light therapy can be carried out in a dermatologist's office or at home.
Fast facts on blue light therapy:
Blue light therapy uses light in the blue wavelength range to kill the bacteria Propionibacterium acnes, or P. acnes, on the skin.
There is no recovery time, and the treatment has relatively few, if any, adverse effects.
Studies show moderate evidence for the efficacy of blue light treatments for people with mild to moderate acne.
It should be noted that most studies on blue light therapy are small and do not report on long-term results. There is a lack of data for outcomes in cases of severe acne.