Use of the Pulsed Infrared Diode Laser (904 nm) in the Treatment of Alopecia Areata

The study investigated the use of a pulsed infrared diode laser (904 nm) for treating alopecia areata in 16 patients with 34 resistant patches. Patients underwent four weekly sessions, and results showed hair regrowth in 32 patches (94%), with 29 patches (90.6%) regrowing terminal hair of the original color. No regrowth was observed in control patches. The response was noted as early as one week after the first session in 24 patches (75%). The study concluded that the pulsed infrared diode laser was an effective treatment for resistant alopecia areata patches.