Pollen allergies are caused by airborne pollens, which are in the form of a very fine powder released by trees, grass, and weeds as they pollinate and fertilize other plants of the same kind. Depending on where you live, your sensitivity may vary dramatically.
WEDNESDAY, April 30, 2025 (HealthDay News) — More children stopped using steroid inhalers to control their asthma after a manufacturer discontinued a popular inhaler, a new study says.