This is the law of the universe, we can't avoid it and we don't want to. We need to be aware. That for every action towards yourself or others, there will be a reaction.
If a painful reaction is neglected it might be like the hot potato that Glennon Melton so beautifully talks about. We treat pain as a hot potato, trying to pass it on to the other person when we're to scared to deal with our own pain.
Some people are the type that think they are really good at suppressing the reaction, with stress, suffering and, in the long run, disease as the consequence.
We can't do anything about the laws of the universe but we can be aware of them and obey when needed. If you, or someone else, acts in a way that hurts you, deal with the reaction. Maybe you need to be extra kind to yourself and listen to the painful emotions. Maybe you need to scream into a pillow or hit something that don't hurt. Maybe you need to set up some really clear boundaries.
And on the flip side, every loving action comes with a reaction of love. Remember this too. No loving act will ever go unnoticed. So, be aware, and make conscious choices about how you act and react.
With all my love,