Abstract
Ultraviolet B radiation has been used in the treatment of different immunomediated skin diseases. Different clinical studies reported the use of excimer lasers and lights in a wide variety of chronic and resistant localized dermatoses. These comprise psoriasis, palmoplantar pustulosis, vitiligo, mycosis fungoides, alopecia areata, genital lichen sclerosus, prurigo nodularis, localized scleroderma, and granuloma annulare. Only mild side effects have been reported.