Blue light and skin: what is the intriguing link?

Blue light has garnered attention, because of its ability to penetrate deeper into the skin layers, induce cellular dysfunction, and DNA damage. Photoaging, hyperpigmentation and melasma are some of the cutaneous changes, developing on exposure to blue light. Till date, the therapeutic role of blue light have been evaluated in dermatological conditions like psoriasis, eczema, acne vulgaris, actinic keratosis and cutaneous malignancies, amongst others. In this review, we have attempted to present an evidence based compilation of the effects of blue light on the skin.