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to hit a raw nerve
01
to mention or do something that causes someone to become upset or angry
What is the origin of the idiom "hit a nerve" and when to use it?
The exact origin of the phrase "hit a nerve" can be traced back to the medical understanding of how physical stimulation of a nerve can elicit a strong, often painful, response. It is also used in social or political discussions when a statement or action deeply affects individuals or groups involved. In these situations, the phrase highlights that a particular subject has struck a sensitive spot, revealing underlying tensions, unresolved issues, or deeply held beliefs.