What is the term for disturbed behaviour that occurs after a major stressful event

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Post-traumatic stress disorder (PTSD) is a psychiatric disorder that can occur in people who have experienced or witnessed a traumatic event. Symptoms may include flashbacks, insomnia, nightmares, and avoidance of reminders of the event. PTSD can occur after events such as military combat, sexual assault, natural disasters, or other life-threatening situations.

What Is the Term for Disturbed Behaviour That Occurs After