There are various synonyms for the phrase "rub salt in the wound" used to describe a person who exacerbates an already unpleasant situation. Some of the synonyms include "add insult to injury," "pour oil on the fire," "twist the knife," "make things worse," "make a bad situation worse," "poke the bear," and "make matters worse." Each of these phrases means essentially the same thing - to make a situation worse by adding additional pain or discomfort - but they each express a slightly different tone or connotation, emphasizing different aspects of the act of exacerbating one's problems. Regardless of which phrase you prefer, the end result is typically the same: making a bad situation even worse than it already was.