Posttraumatic stress disorder
Posttraumatic stress disorder (PTSD) is an anxiety disorder that can develop after a person is exposed to one or more traumatic events, such as major stress, sexual assault, warfare, or other threats on a person's life. Symptoms include disturbing recurring flashbacks, avoidance or numbing of memories of the event, and hyperarousal, continue for more than a month after the occurrence of a traumatic event.Most people who have experienced a traumatizing event will not develop PTSD. People who experience assault-based trauma are more likely to develop PTSD, as opposed to people who experience non-assault based trauma such as witnessing trauma, accidents, and fire events. Children are less likely to experience PTSD after trauma than adults, especially if they are under ten years of age. War veterans are commonly at risk for PTSD.Medications including fluoxetine and paroxetine may improve symptoms a small amount. Most medications do not have enough evidence to support their use.The term ""posttraumatic stress disorder"" was coined in the late 1970s in large part due to diagnoses of US military veterans of the Vietnam War. The concept of stress-induced mental disorder was already known since at least the 19th century, and had been referred to previously under various terms including ""soldier's heart"", ""shell shock"" and ""battle fatigue"".