A bilateral, itchy rash

Case #1

A 40-year-old Hispanic man presents with a bilateral rash on his arms that has been present for several weeks. The patient says the rash itches and appears to be getting worse. On examination, the patient has ill-defined erythematous patches and papules on his dorsal and ventral forearms, bilaterally. The patient has a past medical history of hypertension and diabetes. ...