Many people associate allergies with springtime, but ragweed pollen and outdoor molds that arrive in the fall bring just as much misery.
Thirty-six million Americans endure burning, itchy eyes; sneezing; sniffles; and chapped nostrils caused by allergic rhinitis or hay fever, according to the American Academy of Allergy, Asthma and Immunology (AAAAI). People who have asthma often have allergies that trigger asthma attacks.
If allergies bother you in the fall, you’re most likely sensitive to one or more of the following molds, weeds, trees, or grasses.
Molds
Molds, which produce airborne spores, are common during autumn. Outdoor molds are plentiful in damp gutters, rotten wood, and fallen leaves. Damp fall weather also encourages mold growth indoors in bathrooms, kitchens, basements, carpets, houseplants, refrigerators, garbage cans, books, and upholstered furniture.
Weeds
Ragweed is the most common cause of late summer and fall hay fever symptoms in the United States. This yellow-flowering weed blooms from mid-August to the first frost. It’s most prevalent throughout the Northeast and Midwest, but almost every part of the United States has some ragweed pollen.
Trees and grasses
Most trees and grasses cause allergy symptoms in the spring, but those that pollinate in the fall—such as cedar elm, Chinese elm, September elm and eucalyptus—cause allergic reactions in autumn. Fall allergenic grasses include pampas grass and wild mustard.