30th April 2024

A 35-year-old woman presents with a 2-year history of nasal congestion, sneezing, and itchy, watery eyes, especially during the spring and summer months.

A 35-year-old woman presents with a 2-year history of nasal congestion, sneezing, and itchy, watery eyes, especially during the spring and summer months. She reports no improvement with over-the-counter antihistamines. There is no history of asthma, eczema, or food allergies. Physical examination reveals pale, boggy nasal mucosa and clear nasal discharge. The rest of the ENT examination is normal.

Investigations:

ENT Examination: Pale, boggy nasal mucosa, clear nasal discharge

General Examination: No other abnormalities

Which test is most likely to help confirm the diagnosis?