Information booklet on Post Traumatic Stress Disorder. What is Post-Traumatic Stress Disorder (PTSD)? Who develops PTSD? What are the symptoms of PTSD? Why do some people develop PTSD and other people do not? How is PTSD Treated? How can I hep a friend or relative who has PTSD? How can I help myself? Where can I go for help? What if I know someone in crisis? Next Steps for PTSD Research.