What causes spring allergies?
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The biggest spring allergy trigger is pollen — tiny grains released into the air by trees, grasses, and weeds for the purpose of fertilizing other plants. When pollen grains get into the nose of someone who’s allergic, they send the immune system into overdrive.
The immune system, mistakenly seeing the pollen as foreign invaders, releases antibodies — substances that normally identify and attack bacteria, viruses, and other illness-causing organisms. The antibodies attack the allergens, which leads to the release of chemicals called histamines into the blood. Histamines trigger the runny nose, itchy eyes, and other symptoms of allergies.
Pollen can travel for miles, spreading a path of misery for allergy sufferers along the way. The higher the pollen count, the greater the misery. The pollen count measures the amount of allergens in the air in grains per cubic meter. You can find out the daily pollen count in your area by watching your local weather forecast or by visiting the NAB: Pollen & Mold Counts page on the American Academy of Allergy, Asthma and Immunology’s web site.
Here are some of the biggest spring allergy offenders:
Trees
Alder
Ash
Aspen
Beech
Box elder
Cedar
Cottonwood
Cypress
Elm
Hickory
Juniper
Maple
Mulberry
Oak
Olive
Palm
Pine
Poplar
Sycamore
Willow
Grasses and weeds
Bermuda
Fescue
Johnson
June
Orchard
Perennial rye
Redtop
Saltgrass
Sweet vernal
Timothy
Allergy symptoms tend to be particularly high on breezy days when the wind picks up pollen and carries it through the air. Rainy days, on the other hand, cause a drop in the pollen counts because the rain washes away the allergens.