This is a step-by-step manual of protocols for ultraviolet light therapy in the dermatologist's office. It provides technical information for UVB, PUVA, outpatient daycare, RePUVA, UVA/UVB combination, hand and foot therapy, scalp treatments, and hydrotherapy. It contains examples of patient education handouts, consent forms, laboratory flow sheets, forms for insurance companies, tools for the quantitative measurement of psoriasis severity, and more. The appendices cover skin type, histopathologic evolution of the psoriatic lesion, differential diagnosis, agents that may cause photosensitivity, equipment, letters for home UVB unit, and ultraviolet light treatment in other conditions. The new edition covers modifications to the standard protocols developed at Wake Forest University Medical Center and the Vanderbilt Phototherapy Treatment Center, new sections on laser therapy for psoriasis and vitiligo, and new material on localized UVB treatments.