A 50-year-old male with no significant past medical history presents to the Emergency Department with a chief complaint of facial swelling. The patient had been in his usual state of health when he awoke suddenly in the middle of the night just prior to presentation with lip swelling and an urticarial rash on his back and neck. He denies dyspnea, wheezing, trouble swallowing, nausea, vomiting, or diarrhea…

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