“allergies” / “hay fever” (名詞) = 花粉症
*”pollen” (名詞) = 花粉
A: Are you okay? You’re sneezing a lot.
B: Yah, sorry. I have terrible allergies every spring.
A: Are you okay? Your eyes are red.
B: Yah I know. I have hay fever.
「花粉症」は正しく言うと “allergies to pollen”ですが、”pollen”と言う必要はないです。