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Nonallergic rhinitis involves chronic sneezing or a congested, drippy nose with no apparent cause. The symptoms of nonallergic rhinitis are similar to those of hay fever (allergic rhinitis), but none of the usual evidence of an allergic reaction is present.
Nonallergic rhinitis can affect children and adults, but is more common after age 20. Triggers of nonallergic rhinitis symptoms vary and can include certain odors or irritants in the air, changes in the weather, some medications, certain foods, and chronic health conditions.
A diagnosis of nonallergic rhinitis is made after an allergic cause is ruled out. This may require allergy skin or blood tests.