If you start feeling congested, sneezy, or generally under the weather every August or September, you might wonder, “Am I getting sick, or are my allergies acting up again?” For many people, the answer might be ragweed. Ragweed is one of the most common causes of fall seasonal allergies. A single ragweed plant can release billions of pollen grains into the air, and the pollen can travel considerable distances. If you’re sensitive to ragweed ...