Can you flush out the cause of this unilateral hidrosis?

Matt is a 23-year-old university student who presents with a six-month history of left-sided facial flushing and sweating after exercise, hot showers or eating spicy foods.

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!


Dr Kate Kelso is a GP and medical editor at Australian Doctor.

  1. Approach to flushing in