A 4-year-old black boy with a long-standing history of eczema had a worsening rash and complained of increased itching and cutaneous pain. Two days before presentation, he had begun to run a fever. His current temperature was 101.8°F, and he had eczematous lichenified dermatitis on his legs, arms, torso, and face. Superimposed on the existing dermatitis were numerous small, punched-out, shallow, painful erosions. Some were arranged in clusters and had coalesced. He did not have any appreciable lymphadenopathy.

What is your diagnosis?

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