Acute stress disorder

Features:
Duration over 3 days & less than 1 month
Exposure to actual or threatened trauma
Symptoms from following categories:
Avoidance of internal memories or external reminders
Intrusion (eg, nightmares, flashbacks)
Dissociation (eg, amnesia for event, derealization)
Arousal (eg, insomnia, hypervigilance, startle)
Negative mood

Management:
Trauma-focused, brief CBT
Consider medication for insomnia, intense anxiety
Monitor for PTSD (symptom duration over 1 month)