Prospective 3-month study on the efficacy of UV-free blue light in mild psoriasis vulgaris treatment.

Abstract

IntroductionPsoriasis is one of the most common chronic skin diseases affecting up to 2% of the general population. In recent years, an important direction for the development of treatment for psoriasis has been the use of blue light emitted by LED lamps.AimTo evaluate the efficacy of blue-light emitting device in psoriasis vulgaris treatment.Material and methodsThe study involved 30 adults with a mild form of psoriasis vulgaris not previously receiving biological treatment and other forms of phototherapy. Participants of the study used a device emitting blue LED light for 3 months. Each participant received a device for use at home, with which he/she exposed 2 psoriatic lesions located on the limbs. Before and after the study, the severity of the disease was evaluated using PASI, DLQI and LPSI.ResultsDuring 3 months of the therapy, a statistically significant decrease in the mean LPSI (in both treated locations) and DLQI was noted (LPSI decrease from 5.25 ±1.82 to 1.98 ±1.74, p < 0.0001; DLQI from 7.36 ±5.59 before the study to 5.23 ±4.62 after the study.ConclusionsOur results confirm that phototherapy using blue LED light is both a safe and highly effective way to treat psoriasis.