People with PTSD have intense, disturbing thoughts related to their experience that last long after the traumatic event has ended. Most survivors of trauma return to normal given a little time. However, some people will have stress reactions that do not go away on their own or may even get worse over time. These individuals may develop PTSD. A diagnosis of PTSD requires exposure to an upsetting traumatic event. However, exposure could be indirect rather than first hand.
