A 33-year-old white man arrived at the emergency department (ED) with complaints of a three-day-old rash on his torso, arms, and hands and swelling of his appendages and facial region. He reported ...

Injuries to the lips and mouth Includes inner cheeks and the roof of the mouth (hard and soft palate) Front of the mouth includes the tongue. Also, includes the flap under the upper lip (frenulum).