rubbing salt on the wound

Rubbing salt on the wound is a idiom when you make a matter worse or to make someone very unhappy

You are literally rubbing salt on the wound trying to say sorry to me

Not to rub salt in the wound

A phrase commonly said by coil that is used when somebody is about to say something that needs to be said but that might upset another person.

"Not to rub salt in the wound but are you still gonna watch the super bowl?"