An allergy that occurs in a particular season is known as hay fever. This fever usually arises when your immune system overreacts to an outdoor allergen such as pollen. The most common types of allergens are pollen from wind-pollinated plants such as trees, grasses, and weeds. The pollen from the pollinated plants is too massive to remain airborne for long and they are less likely to trigger an allergic reaction. Seasonal allergies arise less during the winter season. Different plants erupt respective pollen at different times of the year. Relying on the allergy triggers and the place you live, you might experience hay fever in more than one season.
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