A 16 year old patient returns to clinic after spending spring break in Miami complaining of separation of his nails from his nail bed. He also has a sunburn. The patient has erythematous comedones and pustules on his cheeks, forehead, chin and upper back [see photo], and was started on treatment for these findings at his last visit. Which of the following most likely caused his nail findings?

A. Oral doxycycline

B. Topical clindamycin solution

C. Topical azelaic acid

D. Acetaminophen

E. Benzoyl peroxide 5% wash

To find out the correct answer and read the explanation, click here.

This weeks question features a photo from the Full Spectrum of Dermatology: A Diverse and Inclusive Atlas.