Derm Dx: A rash flares after discontinuing prednisone

A 48-year-old patient presents complaining of rash. She had initially presented to urgent care with a milder rash several weeks ago and was prescribed a prednisone taper. The prednisone cleared the initial rash, but two days after stopping the prednisone she developed a more severe rash (pictured). She complains of malaise. On exam she is shivering and tachycardic.