A 4-year-old boy presents with a rash on his forearm. His mother thinks he scraped his arm a few days ago and this rash developed over the area of the abrasion. He is a generally healthy child, on no medications, and up-to-date on immunizations. He attends preschool. He has been afebrile and doesn't report any symptoms other than the rash. The rash is not itchy.
Physical exam is normal, with the exception of a skin lesion on the left forearm. There are several erythematous clustered papules with a golden-colored crust on top.
What is the most appropriate treatment for this patient?
This question appears in Med-Challenger Pediatric Medicine Exam Review with CME.