re: My Son is struggling with PTSD Update page 7

Ditto to the posts mentioning therapy coupled with EMDR. People dealing with PTSD are not “remembering” the traumatic event. The body and brain response is similar to someone who is actually in that stressful event. EMDR by a certified professional can help your son get past the body’s physiological response and allow him to process the therapy.
A great book to read (not an easy read, but I can’t recommend it enough) to help you understand what he’s dealing with is THE BODY KEEPS THE SCORE by Bessel van der Kolk.
I wish your son and your family the very best.