Intentionally or unintentionally, we all cause others pain. It is a sad fact of human existence. Cheryl Dickow has written a thought-provoking article called You Can't Handle the Truth. The message is that we should want to know when we have wronged people so that we can attempt to make amends. I agree 100%.
Sometimes, though, there is simply no way to fix a wrong. What is one to do when one has tried with all their might to make things right and failed? When the hurts simply compound instead of lessen? I think that the only thing that can be done then is to turn it all over to God and trust. It doesn't necessarily take away the hurt, but sometimes it is the only course of action that remains. There is nothing so bad that God can't bring some good out of it. I firmly believe that.