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Is It Pollen, or Something Else?

Medically Reviewed by Carol DerSarkissian on December 07, 2020

If your symptoms happen every so often in spring, summer, or early fall, you may have seasonal allergies. Tree pollen is a problem in spring, grass pollen in late spring and summer, and weeds in fall.

If you have symptoms year-round, you may be allergic to dust mites, pet dander, or mold and mildew. Mold spores can also be a problem outdoors, usually when weather is warm and humid.

It’s possible to have both kinds of allergies. Your allergist can help you figure out more exactly what you’re allergic to.