Asthma is a lifelong condition of the airways that causes symptoms like coughing, wheezing, chest tightness and difficulty breathing.1,2
It's not always taken seriously, but asthma symptoms can sometimes become life-threatening.2
Your airways are the little tubes that help you breathe. In people with asthma, those tubes can get irritated and swollen on the inside - becoming inflamed.2,3
When this happens, the walls of the airways swell up, muscles tighten around them, and they can make extra mucus. All of that makes it harder for air to flow in and out.4
That's why breathing can feel tight, wheezy, or like you're trying to suck air through a straw.
These symptoms can come and go, but may be triggered by things like allergens, smoke, exercise, or even cold air.1,2,5
Did you know, that there is a straightforward and gentle way to understand if you have asthma?6 It's called a feno test.
As simple as blowing bubbles in a drink, you can learn more about your airways quickly with a healthcare professional.
The best news? It's available at most doctors' surgeries.
Simply ask your healthcare provider about feno testing at your next visit.
1. World Health Organisation. Asthma. 2024. Available at; https://www.who.int/news-room/fact-sheets/detail/asthma
2. Asthma and Lung UK. What is asthma? 2025. Available at; https://www.asthmaandlung.org.uk/conditions/asthma/what-asthma
3. American Lung Association. What Is Asthma? 2025. Available at; https://www.lung.org/lung-health-diseases/lung-disease-lookup/asthma/learn-about-asthma/what-is-asthma
4. University of Florida Health. Lung Function in Asthma. 2025. Available at; https://pulmonary.pediatrics.med.ufl.edu/centers-programs/asthma-program/lung-function-in-asthma/
5. NHS. Asthma. 2025. Available at; https://www.nhs.uk/conditions/asthma/
6. Alving K et al. Validation of a new portable exhaled nitric oxide analyzer, NIOX VERO®: randomized studies in asthma. Pulm Ther. 2017;3:207-18.