Past hurt and present

This question has been answered previously. However, I want to piggyback on it and ask the following. I’m aware that what one has experienced in the past does not need to be relived in order to grow, but what about in order to heal? There are wounds that never really close, others that close but create some discharge now and then. So, how is this treated in coaching? Is it just part of the 50/50 that one just has to live with, as Brook says? Or is there a possible way to deal with it so that it can morph into a scar that holds the memory but exists as such?