hit a nerve
触及敏感点
口语·触及他人痛处
英文释义
to say or do something that greatly upsets or offends someone, particularly by touching on a sensitive or emotional issue
例句
When I mentioned his ex-girlfriend, I could tell I hit a nerve.
典故来源
源自医学，敲击神经会引发疼痛反应，比喻触及他人敏感话题引发强烈情绪。