touch a nerve 触及要害；触动痛处

【例句】
Amy saw Mike shrink, as if the words had touched a nerve.
艾米看到迈克向后缩了一下，好像那些话触到了他的痛处。

Your column must have hit a nerve,because we are getting slammed with feedback from readers—and they're not happy.
你的专栏肯定戳到痛处了，因为我们收到了来自读者的大量反馈——他们很不高兴。