How is nonallergic rhinitis diagnosed?
Your doctor diagnoses nonallergic rhinitis with a physical examination and a review of your medical history. In some cases, further testing helps confirm your diagnosis.
Your doctor may recommend allergy testing to confirm that allergies aren’t causing your condition. Allergy tests use blood tests or a skin prick test, which exposes your body to small amounts of specific allergens.
In rare cases, doctors examine the inside of your nose and nasal passages with a long, flexible tube called an endoscope. During the exam, the doctor can identify any other problems that may cause your symptoms, such as nasal polyps. Nasal polyps are noncancerous growths of tissue occurring in your sinuses or nasal passages.
Your doctor may recommend a computed tomography (CT) scan. This test uses X-rays to create detailed pictures of the inside of your nose. Your doctor may order other tests, like a nasal inspiratory flow test, to measure how much air enters your lungs when you inhale.