Two metropolitan areas in the Pacific Northwest made the top 10, including a city in Washington state. Boise was the No. 1 worst city for allergy sufferers in the nation, according to the foundation.

A cold end to winter, combined with a surge of March warmth, has allowed for many trees to pollinate at the same time.

RALEIGH, N.C. (WNCN) — The warm weather means birds are chirping and flowers are starting to bloom. But if you suffer from seasonal allergies, it also means pollen season has returned. Tree pollen is ...