Tag: FeNO testing
- By Percival Harrington
- /
- 26 Feb 2026
FeNO Testing: How It Helps Manage Asthma by Measuring Airway Inflammation
FeNO testing measures airway inflammation in asthma by detecting nitric oxide in exhaled breath. It helps confirm diagnosis, predict steroid response, and reduce asthma attacks by up to 50% when used to guide treatment. Learn how it works and who benefits most.