Post-Traumatic Stress Disorder is a more significant intrusive response to a traumatic event. This would include the ongoing experience of: 1) Reliving of the traumatic events, 2) Avoidance of the reminders of the event and 3) Increased arousal as a result of the event. These three factors are relevant in the formal diagnosis for PTSD. The symptoms are ongoing and become the organizing principle of the individual’s life. They interfere significantly with the person’s quality of life and can be very debilitating.