Posttraumatic Stress Disorder

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Overview

Posttraumatic stress disorder (PTSD) is an anxiety disorder that a person may develop after experiencing or witnessing an extreme, overwhelming traumatic event during which they felt intense fear, helplessness, or horror.


The dominant features of posttraumatic stress disorder are emotional numbing (i.e., emotional nonresponsiveness), hyperarousal (e.g., irritability, on constant alert for danger), and reexperiencing of the trauma (e.g., flashbacks, intrusive emotions).

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