Meaning of the word "hit a raw nerve" in English

What does "hit a raw nerve" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

hit a raw nerve

US /hɪt ə rɔ nɜrv/
UK /hɪt ə rɔ nɜrv/
"hit a raw nerve" picture

Idiom

1.

to upset someone by referring to a sensitive topic

Example:
His comment about her failed business really hit a raw nerve.
Be careful what you say; you might hit a raw nerve with him about his divorce.
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