30th April 2024

A 35-year-old swimmer presents with a 4-day history of right ear pain and itching.

A 35-year-old swimmer presents with a 4-day history of right ear pain and itching. She reports that the symptoms began after a swimming session. She denies any hearing loss or discharge. On examination, there is tenderness when the tragus is pushed and when pulling the earlobe. The external auditory canal appears red and swollen but there is no visible discharge. The tympanic membrane is not clearly visible due to the swelling.

Vital signs: Normal temperature, pulse, and blood pressure.

Which test is most likely to help confirm the diagnosis?