There is a saying in Buddhist teaching called the Two Arrows of Suffering. When hit with one arrow you will feel pain, but if you are hit in the same place you will feel a multiple of pain.
This teaching refers to what happens when we are hurt somehow: Either we made a mistake or someone did something to us which is developing a reaction inside. It’s our choice to hit ourselves in the same place with either feelings of regret or just plain obsession with the matter.
So the next time you are suffering somehow, try to catch yourself adding salt to the your own wounds and decide if you really want to live like this.