Skin picking disorder is well described by two experts in the field, Drs. Calikusu and Tecer, who explain the prevalence (in approximately 2% of dermatology clinic populations) as well as the history of attention to the disorder, dating back to the late 1800s. Skin picking disorder is not recognized in DSM as a specific entity but rather is diagnosed under impulse control disorder not otherwise specified. The authors do a good job of linking this disorder to phenomenologically similar entities, describing the overlap as well as areas that distinguish each of these entities. Examples include trichotillomania, obsessive-compulsive personality disorder, and obsessive-compulsive disorder as well as various psychiatric and medical entities. The authors propose a specific diagnostic nomenclature that includes compulsive, impulsive, and mixed subtypes, and they detail the clinical presentation of each. This is quite valuable in the effort to focus on etiology as well as specific treatments, both psychological and pharmacologic. There are clear descriptions of skin picking behavior and its effect on individuals suffering from this disorder and the functional problems that they encounter. As with many of the impulse control disorders, people suffering from skin picking disorder rarely seek psychiatric care as a primary therapy and are often first encountered in dermatology and primary care clinics. It is a disorder that begins in adolescence, is more common in women, and is often associated with a high rate of other comorbid disorders, such as mood disorders and substance abuse, as well as other impulse control disorders, such as trichotillomania. The authors conclude the chapter by describing several small pharmacologic trials and case series illustrating successful treatment of this disorder with various serotonin selective reuptake inhibitors as well as with other pharmacologic agents. They also describe several nonpharmacologic (behavioral) and cognitive-behavioral therapy techniques that are effective. Overall, the chapter provides a comprehensive description of the disorder, its functional effects and epidemiology, and treatment.