hit/touch a (raw) nerve
to upset someone by talking about a particular subject.
I think I hit a nerve with my comments about divorce.
She suddenly looked distressed and I knew I'd touched a raw nerve.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。