Phototherapy, or the usage of light to treat diseases, is an important modality in a physician's therapeutic armamentarium. It is effective for a number of common skin conditions like atopic dermatitis, psoriasis and vitiligo. The accurate diagnosis of a photodermatosis or light-related skin disorder relies on a good clinical history and physical examination, supported by diagnostic investigations such as phototesting.Phototherapy and Photodiagnostic Methods for the Practitioner is the first published set of practical guidelines for Asian skin, drawing upon our cumulative clinical experience...