Why does pollen cause your body to go haywire? We asked Dr. Purvi Parikh, an allergist and an immunologist in New York City, how allergic reactions happen. Because the more you know, the better you can save yourself from the misery.
The 1-hour window
“Seconds after you touch or inhale an allergen, your body produces histamines, chemicals released by immune cells. Symptoms can then develop within 20 minutes,” Dr. Parikh says. Take an antihistamine an hour before exposure, though, and you can block that process and stay virtually symptom-free.