Test your diagnostic skills in our regular dermatology quiz. What is the cause of this itchy vesicular rash on a child’s lower abdomen and upper legs?
A 10-year-old girl presents with an intensely itchy vesicular rash on her lower abdomen that extends to her upper legs (Figure 1a). Some of the lesions are pustular. The rash was of acute onset, and occurred about one week after the sudden appearance of a lesion on her lower leg that is oedematous, crusted and exudative (Figure 1b). The girl is otherwise well and she has no history of dermatological problems.