Seasonal allergies are also called hay fever or seasonal allergic rhinitis. These allergies occur during particular times in... moreSeasonal allergies are also called hay fever or seasonal allergic rhinitis. These allergies occur during particular times in a year, normally, when pollens are released into the air by grasses, trees, and weed. Allergy meds effectively treat seasonal allergies. Antihistamines, a group of allergy meds are the first-line treatment for seasonal allergies.