Ring around the nevus

A healthy adolescent boy is dragged by his concerned mother to your office for evaluation of several moles with surrounding white rings (figure1) . She noticed the asymptomatic lesions on her son’s back several days ago following a trip to the beach. What's the diagnosis?

“The worst atopic dermatitis of my life”: a True Dermatologic Emergency

You are called to the emergency room to see an ill looking 13-year-old boy with a severe flare of his atopic dermatitis associated with fever, malaise, and chills for the last week. What’s the diagnosis?