Living through trauma is bad enough, but post-traumatic stress disorder (PTSD) can transform the pain into a continual nightmare. PTSD is a psychological disorder in which an individual relives specific traumatic experiences--through flashbacks, nightmares, anxiety-ridden thoughts, and memories. PTSD, often the result of a violent event in the individual's life (such as rape, war, accidents, etc.), can occur for years after the event--and is also connected to symptoms such as insomnia, anxiety, anger, and depression. If you think you might be suffering from PTSD, it's best to seek immediate psychiatric help.