1st April 2022

A 42-year old man presents with a two-day history of right-sided ear pain

A 42-year old man presents with a two-day history of right-sided ear pain. The pinna and tragus of his right ear appear to be reddened and swollen, and there is a small amount of discharge. His hearing has not been affected. The patient also complains of his ear being itchy, and he has been finding it difficult not to scratch the skin. His past medical history includes atopic eczema, and he is otherwise fit and well. 

Which of the following is the most likely cause?

Select the SINGLE most appropriate option from the list below. Select ONE option only.