42-year-old man complained of new lesions following a business trip

A 42-year-old man complained of new lesions following a business trip. He noticed that the lesions all appeared in the morning, just before he returned from his trip. The lesions itched. On exam there were multiple round, red, minimally elevated papules, all of a uniform shape.

View the image taken (Figure 1) and consider what your diagnosis would be.