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A member asked:
Why does hay-fever come at a certain time of the year?
7 doctors weighed in across 2 answers
Specific triggers: "hay fever" is another name for seasonal allergies. It comes at a certain time in the year, because it is related to specific allergens. Tree pollen causes symptoms in spring, grass pollen in summer, and weed pollen in fall.
Answered 4/8/2015
6.3k views
Pollen: Different pollens polliniate at different times of the year so depending on what you allergic to the symptoms vary. For instance in the north east U.S., trees polinate in the early spring, next comes grass pollen, and then in the fall ragweed and other weeds cause heyfever symptoms.
Answered 2/8/2017
5.5k views
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