What is another word for touching sore spot?
Pronunciation: [tˈʌt͡ʃɪŋ sˈɔː spˈɒt] (IPA) 
The phrase "touching sore spot" refers to an action or statement that has upset or offended someone, often bringing up a sensitive issue. There are several synonyms that can be used to express this idea, including: hitting a nerve, striking a chord, pushing a button, triggering a reaction, rubbing salt in a wound, treading on thin ice, stepping on someone's toes, and walking on eggshells. Each of these phrases conveys the notion of unintentionally or intentionally bringing up a topic or issue that is uncomfortable or painful for the individual. It's important to be mindful of these sensitive areas in conversations and interactions with others.
