Post-Traumatic Stress Disorder

Post-traumatic stress disorder, also known as PTSD, is among only a few mental disorders that are triggered by a disturbing outside event, quite unlike other psychiatric disorders such as depression.
Many Americans experience individual traumatic events ranging from car and airplane accidents to sexual assault and domestic violence. Other experiences, including those associated with natural disasters, such as hurricanes, earthquakes, and tornadoes, affect multiple people simultaneously. Dramatic and tragic events, like the terrorist attacks on the World Trade Center and Pentagon, and wars occur, and with media exposure such as we have today, even people not directly involved might be affected. Simply put, PTSD is a state in which you "can't stop remembering."
Although the disorder must be diagnosed by a mental health professional, symptoms of PTSD are clearly defined. To be diagnosed with PTSD, you must have been in a situation in which you were afraid for your safety or your life, or you must have experienced something that made you feel fear, helplessness, or horror.
The worse the trauma, the more likely a person will develop PTSD, and the worse the symptoms. The most severely affected are unable to work, have trouble with relationships, and have great difficulty parenting their children.