Hay Fever: MedlinePlus - National Library of Medicine - National Institutes of Health

Hay Fever: MedlinePlus - National Library of Medicine - National Institutes of Health

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日期:2024-05-14
Each spring, summer, and fall, trees, weeds, and grasses release tiny pollen grains into the air. Some of the pollen ends up in your nose and throat. This can trigger a type of allergy called hay fever. Symptoms can include Sneezing, often with a runny or...看更多