Acute StressDisorder and Posttraumatic Stress Disorder (PTSD)

They are reactions to traumatic events. The reactions involve intrusive thoughts or dreams, avoidance of reminders of the event, and adverse effects on mood, cognition, arousal, and reactivity. ASD typically begins immediately after the trauma and lasts from 3 days to 1 month. PTSD can be a continuation of ASD or manifest up to 6 months after the trauma, lasting for >1 month.