Idiom of the day :- Rub salt into someone’s wounds

Usage, examples and definition of the Idiom :-

We all know what it’s like to accidentally get salt in a wound. It hurts ! It hurts too, when someone or something deliberately adds to our pain when we feel shame, regret or defeat. ‘Must you rub salt into my wounds by telling me how much fun I missed by not going to Tracy’s party ?’ Heather sighed