Pain is just pain. When it is gone, it is gone. Psychological or physical.

Changing your life or changing the way you are, changing your patterns; that of course is not easy. But once you have a life that is very improved, past pain (at least the pain itself) no longer affects you in the present. You won't feel bad because you once felt bad. In fact, if you feel bad and you suddenly have a reason to not feel so bad anymore, I sometimes get a moment of euphoria. Like some kind of burden falls off you. Like your personality crushed by events in your life suddenly opens up and blossoms, ready to extent further, because the thing that was crushing it is no longer there.