Q. WHAT IS THUNDERSTORM ASTHMA?
Thunderstorm asthma is thought to be triggered by thunderstorms that have rapid changes in wind, temperature and humidity. These changes can cause pollen grains to absorb moisture, burst open and release large amounts of small pollen-allergen particles that can penetrate deep into the small airways of the lung. People affected by thunderstorm asthma have usually had severe hay fever and have been found to be allergic to ryegrass pollen.