汗が

sweat

→ 汗

phrase Rare #34,252

sweat が marks 汗 (sweat) as the subject of the sentence.

JA: 汗が目に入った。

EN: Sweat got in my eye.

汗が傷にしみる

The sweat stings the wound.

— さらば、わが愛／覇王別姫 (1993)

なんで汗が目に入ると痛いの？

Why does it hurt when sweat gets in your eyes?

汗がダラダラです。

I'm sweating profusely.