Psoriasis is the most common skin condition encountered by clinicians in the United States and around the world. The new third edition of this succinct handbook discusses the topical, oral, biologic, and intravenous medications and phototherapies for the treatment of psoriasis as well as the initial diagnosis and assessment of the condition. This handbook also features a new chapter on scalp psoriasis and a color photo section with commonly encountered variations of the disease, including scalp, nail, and plaque psoriasis. In addition, a chapter has been included to help nonspecialists decide when a patient with psoriasis should be referred to a dermatologist. A full-color insert will aid the physician in diagnosing the various stages and types of psoriasis.