Review Question - QID 210843

A 19-year-old man presents to a local free clinic after having 1 week of a sore throat, hoarseness, cough, and fever. Additionally, he has noticed a rash appearing on his right arm. The man is homeless and states that he has been sleeping at a shelter. He reports he is otherwise healthy. Today, the patient’s temperature is 101.3°F (38.5°C), blood pressure is 112/72 mmHg, pulse is 88/min, and respirations are 12/min. On exam, the patient demonstrates erythema in the oropharynx. There are mild expiratory wheezes bilaterally. On skin exam, the patient’s right arm demonstrates raised, targetoid lesions with central duskiness and a peripheral red ring, which are shown in Figure A. Serology testing is positive for IgM against Mycoplasma pneumoniae. Which of the following is a characteristic of his skin disease?