When you want to express the situation of making someone feel worse after they have already been hurt, the phrase "rubs salt into wound" can be used. However, there are several other synonyms of this phrase such as twisting the knife, adding insult to injury, pouring oil on the flames, kicking a man when he is down and rubbing it in. All of these phrases express the same idea. The essential meaning behind using all these phrases is to describe when a person intentionally makes someone else suffer emotionally. It's important to choose your words wisely as they can have a significant impact on how you communicate your feelings.