I did an exposure therapy for PTSD. We had to modify it somewhat; it is supposed to be weekly for 12 weeks and I needed to go much more slowly so it was twice a week for about 4 months. It was extremely hard work (I wrote stories about my childhood and then recorded them and listened to them a few times daily and then we talked about that "story" until I could handle it and then on to the next one.) I am very glad I did it; it calmed my PTSD by 85% or so.