A 22-year-old landscaper presents to the ED with a rash that began approximately three weeks ago. He reports it started with a single bump on his left forearm that has been oozing fluid. He subsequently developed lesions tracking up his arm. He denies any joint pain, decreased range of movement, fever, numbness, or weakness. On exam, he has an area of redness overlying a small papule and a rash spreading proximally as depicted in the image above. Which of the following is the most appropriate treatment for this condition? A. Acyclovir
B. Hydrocortisone 1%
C. Itraconazole
D. Permethrin