Oral allergy syndrome is also known as pollen-food syndrome.It usually occurs in those who have hayfever in the spring or summer and who are allergic to pollen from trees (especially birch trees), grasses or weeds.
Nasal sprays can be an effective way of treating nasal allergies by delivering medication directly into the nose. Decongestant nasal sprays can also help clear a blocked nose caused by hayfever, dust or pet allergies.
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