Trauma and stressor related disorders include post-traumatic stress disorder (PTSD) and acute stress disorder. Trauma can result from extremely distressing experiences like accidents, deaths, or rape that cause severe emotional shock and long-lasting psychological effects. Symptoms include nightmares, anxiety, depression, guilt, anger, and substance abuse. Predisposing factors include characteristics of the traumatic experience itself, individual traits like coping abilities or preexisting conditions, and aspects of the recovery environment like social support. Treatment involves cognitive therapy, prolonged exposure therapy, group therapy, EMDR, and psychopharmacology with medications like antidepressants or anti-anxiety drugs.