Trauma and Post-Traumatic Stress Disorders are serious conditions that can develop after a person has experienced or witnessed a traumatic or terrifying event in which serious physical harm occurred or was threatened. Most people who experience a traumatic event will have reactions that may include shock, anger, nervousness, fear, and even guilt.
These reactions are common; for most people, these conditions go away as they express those feelings to others or work through them on their own. For some, these feelings continue and even increase, becoming so strong that they keep the person from living a normal life. Others may experience a shutting down of their emotions and withdrawal from interactions with others. Some from both groups turn to alcohol or other drugs to blunt their pain.
You should seek treatment if you have symptoms for longer than one month and cannot function as well as before the event occurred. Treatment of PTSD includes individual therapy and medication.
For more information, go to: http://www.nimh.nih.gov/health/topics/post-traumatic-stress-disorder-ptsd/index.shtml