PTSD stands for post-traumatic stress disorder and is a psychological disorder than happens when someone goes through or sees a life-threatening event. Like we mentioned before, it is usually associated with military service members. But, it can also be associated with people who have been victims of natural disasters, car accidents, and sexual and/or physical assault.
After experiencing a traumatic accident like a car accident, many people have nightmares, suffer from anxiety, and can be triggered by everyday normal events. Usually, they have a difficult time going back to their normal lives. These symptoms can go away after a month. However, if a person experiences them for over a couple of months, they might be experiencing PTSD.