sore spot
sore spot or sore point {n.}
A weak or sensitive part; a subject or thing about which someone becomes angry or upset easily.
Don't ask Uncle John why his business failed; it's a sore spot with him.
Compare: WHERE THE SHOE PINCHES.
Categories:
Source: A Dictionary of American Idioms
An client error occurred: Error calling GET https://www.googleapis.com/youtube/v3/search?part=id%2Csnippet&q=%22sore+spot%22&maxResults=4&videoEmbeddable=true&videoSyndicated=true&safeSearch=strict&type=video&key=AIzaSyCfLRuAZZNAQm6a5uDzgY-Tt668bxsppCs: (403) The request cannot be completed because you have exceeded your <a href="/youtube/v3/getting-started#quota">quota</a>.