アレルギーなんだ

I'm allergic

→ アレルギー

phrase Rare #34,113

I'm allergic Used to explain that you have an allergy. In joking contexts, アレルギー can be used figuratively to mean a strong dislike or aversion.

JA: 私、猫アレルギーなんだ。

EN: I'm allergic to cats.

I'm allergic.

— es［エス］ (2001)

I'm allergic to milk.

Tom is allergic to strawberries.