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Allergic Conditions: Pollen Pollen is the male fertilizing agent of flowering plants, trees, grasses, and weeds. Pollen is a central cause of many allergic reactions. Weather conditions affect pollen levels. The most variant factors influencing different pollen counts from approximately the same region are wind, humidity, and the proximity of the sampling equipment to pollen producing vegetation. Because pollens are small, light and dry, they can be easily spread by wind, which keeps pollen airborne and carries it over long distances. When the air is humid, such as during or after it rains, pollen becomes damp and heavy with moisture, keeping it still and on the ground. Resources about pollen:
Please visit an allergist for more information on allergic disease and your individual medical condition. If you need to locate an allergist in your area, visit the Academy’s online Physician Referral Directory. |
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© 1996-2008 · All Rights Reserved · American Academy of Allergy Asthma & Immunology |
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