A 17-year-old male presents with a one-year history of a pruritic rash on his face.

Test your clinical know-how by taking the quiz below. If you select the wrong answer, have another go — you can try as many times as you like!

<p>A 17-year-old male presents with a one-year history of a pruritic rash on his face.</p><p>He reports the intermittently pruritic and non-painful rash appeared within weeks of receiving an eyebrow waxing treatment.</p><p>The patient is otherwise well with no known allergies or significant past medical history.</p><p>There is no family history of atopy, psoriasis or autoimmune conditions. The patient is a full-time student and has no pets.</p><p>Examination demonstrates a well-demarcated erythematous patch with overlying scale lateral to the right eye (pictured) and central forehead.</p><p>There is mild bilateral cubital fossa erythema, consistent with chronic eczema. There are scant open and closed comedones on the central forehead and upper back.</p>

Professor Dedee Murrell is head of dermatology at St George Hospital and conjoint professor at the University of NSW, Sydney.