Localized Scratch Dermatitis

A dark irregularly shaped patch of itchy, dry, and scaling skin is seen on the back of the neck. This finding, the result of chronic scratching or rubbing, is typical of localized scratch dermatitis.

(From TB Fitzpatrick, Color Atlas and Synopsis of Clinical Dermatology, 3 ed, 1997, McGraw-Hill, Fig. 3-11; with permission.)