Among the criteria for the diagnosis of Acute Stress Disorder specified in the Diagnostic and Statistical Manual – IV (DSM-IV) the person, either while or after experiencing the distressing event, has three or more of the symptoms listed above. The problems must cause clinically significant distress or impairment in social or other important areas of functioning. The symptoms must last for a minimum of 2 days and a maximum of 4 weeks and must occur within 4 weeks of the traumatic event, and not be the result of a preexisting medical condition.