FeNO test

FeNO test

What this test checks

A simple breathing test that detects airway inflammation.

Why it’s done

To

Diagnose asthma
Monitor inflammation
Guide inhaler adjustments

How it works

You breathe out steadily into a small device.
Device measures nitric oxide levels — a marker of inflammation.

Who should get it

Adults or children with frequent allergy symptoms
Those unsure about their triggers
Patients with asthma, eczema or chronic rhinitis

Are your symptoms trying to tell you something?