Sometimes, an event that occurs within minutes can affect people for the rest of their lives. For example, a car accident, robbery, or natural disaster are time-limited situations. These occur once and only for a short duration, but the trauma may remain with the affected individuals. On the other hand, some experiences happen repeatedly or last for months — even years — at a time. For these situations, the trauma can also remain for prolonged periods, but it may present a different set of risks for the affected individual.