Review Question - QID 109590

A 27-year-old man presents to his primary care physician for a skin rash that has recently developed and is very itchy. The patient has a past medical history of asthma, seasonal allergies, constipation, anxiety, and depression. His current medications include albuterol, fluticasone, diphenhydramine, fluoxetine, metformin, and clonazepam. His temperature is 99.5°F (37.5°C), blood pressure is 139/67 mmHg, pulse is 80/min, respirations are 13/min, and oxygen saturation is 98% on room air. A pulmonary exam is notable for mild wheezes and good air movement. A cardiac exam reveals a normal rate and rhythm. A dermatologic exam reveals the findings seen in Figure A. Which of the following describes the most likely diagnosis?