Well, in one way, having a good experience discussing your trauma and receiving caring support and skilled guidance creates a corrective experience.

Of course you can't undo the original experience, but you can re-experience it to a certain extent by sharing it and sharing how it troubles you, and the healing is in doing that with the right person, having a witness, skilled guide and sympathetic presence to share your story.

That does involve being vulnerable, which is very very hard for me and many, but necessary and healing when done with the right person/people.