Car accidents cause financial strains, damages to property, and physical injuries. They cause victims to feel anger, fear, and shock, which are normal responses to such an ordeal. For others, car crashes lead to the development of a mental disorder called post-traumatic stress disorder or PTSD. About 10 percent of car accident victims suffer from it. PTSD is a stress and trauma-related disorder that may develop after being exposed to an event or ordeal wherein there was a threat or occurrence of death, serious physical injury and harm,.