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Posttraumatic Stress Disorder

Written by the Fiveable Content Team โ€ข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated September 2025

Definition

Posttraumatic Stress Disorder (PTSD) is a mental health condition that occurs after experiencing or witnessing a traumatic event. It is characterized by symptoms such as intrusive thoughts, nightmares, flashbacks, and intense anxiety.

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Posttraumatic Stress Disorder Definition - AP Psychology Key Term | Fiveable