PTSD is a mental health problem that can develop after experiencing or witnessing a life-threatening or extremely upsetting event.
Symptoms of PTSD can include unwanted memories of the event, avoidance of reminders of the event, feeling jittery or on-guard, and feeling sad, numb, or hopeless.
PTSD can affect anyone. Symptoms may develop immediately after a traumatic experience, or after several weeks or months. The severity of symptoms may come and go over time.