13th August 2024

A 39-year-old office worker attends your headache clinic. He reports a 5 month history of continuous right-sided headache

A 39-year-old office worker attends your headache clinic. He reports a 5 month history of continuous right-sided headache. The pain is mostly located behind his right eye and his family have commented on the fact that his right eye sometimes looks red and watery. He has tried paracetamol, ibuprofen and sumatriptan with minimal improvement. What intervention is most likely to confirm the diagnosis?

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