Q. A 35-year-old office worker presents to the dermatology clinic with a two-week history of an itchy rash on the right wrist. The patient reports that the rash started a few days after wearing a new metal watch. The rash has not improved with over-the-counter hydrocortisone cream. There is no history of similar rashes in the past, and the patient is otherwise healthy. Physical examination reveals erythematous, vesicular lesions confined to the area where the watchband contacts the skin. There are no lesions elsewhere on the body. Rest of his systemic examination is unremarkable. Given the clinical presentation, what is the most likely diagnosis?