does rain make allergies worse?
If so, that's completely normal, said Warner Carr, MD, an allergist and fellow of the American College of Allergy, Asthma and Immunology. Rain often washes pollen out of the environment, but first, it bursts pollen particles, spreading allergens farther, Dr. Carr said. (ABOVE: The Worst Cities for Fall Allergies) During a rainstorm, the pollen in your environment gets saturated and fractures, releasing small particles into the air at a much higher concentration, he explained. When patients inhale them it causes a syndrome called 'thunderclap asthma.'.