low-grade fever, slight fever
微熱があるようですね。
It seems like you have a slight fever.
喉が痛くて微熱があるんです。
I have a sore throat and a slight fever.
微熱があったから、ベッドに横になってたの。
I had a slight fever, so I was lying in bed.
微熱があります。
I have a slight fever.
微熱があったの。
I had a slight fever.