Post-traumatic stress disorder (PTSD) is a debilitating condition that affects people who have been exposed to a major traumatic event. PTSD is characterized by upsetting memories or thoughts of the ordeal, "blunting" of emotions, increased arousal, and sometimes severe personality changes. Once called "shell shock" or battle fatigue, PTSD is most well known as a problem of war veterans returning from the battlefield. However, it can affect anyone who has experienced a traumatic event, such as rape, robbery, a natural disaster, or a serious accident. A diagnosis of a serious disease can trigger PTSD in some people. Considered to be one of a group of conditions known as "anxiety disorders," it can affect people of all ages who have experienced severe trauma. Children who have experienced severe trauma, such as war, a natural disaster, sexual or physical abuse, or the death of a parent...