Post-traumatic stress disorder (PTSD)
Post-traumatic stress disorder (PTSD) is an anxiety disorder caused by very stressful, frightening or distressing events. It can be anything that is out of the ordinary or deeply distressing to someone such as an accident, a fire or witnessing a traumatic event such as a death. It can also be large scale following a major natural disaster. Deliberate acts of violence, for example, being held at gunpoint or raped, are more likely to result in PTSD than natural events or accidents.