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Pollen

What is pollen?

Pollen is the cells of flowering plants, including trees, grasses, and weeds. Pollen is microscopic in size.

Pollen is the most common cause of seasonal allergic rhinitis, sometimes known as "hay fever."

Which plants produce pollen that cause allergic reactions?

Plants that have powdery granules of pollen that are easily blown by the wind, include the following:

Most flowering plants, such as roses, have heavier, waxy pollens that do not trigger allergies.

When is "pollen season?"

Each plant has a pollen season. It usually starts in the spring, but may begin as early as January in the western areas of the US. The season usually lasts until October.

Can allergic rhinitis in pollen season be prevented?

To lessen the effects of allergic rhinitis during pollen season, the American Academy of Allergy, Asthma, and Immunology suggests the following:

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