It is not strange for individuals, who have experienced terrible events to have intrusive memories, nightmares, or flashbacks when something dreadful happens. Post-traumatic stress disorder is a potentially serious and debilitating condition, which can occur in individuals, who have witnessed or experienced a serious accident, natural disaster, unexpected death of a family member, rape, violent personal assault, or terrorist incident. People with PTSD actually continue to be anxious, frightened and depressed for months and even years.
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