acute stress disorder
[DSM-IV] an anxiety disorder characterized by development of anxiety and dissociative and other symptoms within one month following exposure to an extremely traumatic event; symptoms include reexperiencing the event, avoidance of trauma-related stimuli, anxiety or increased arousal, and some or all of the following: a subjective sense of diminished emotional responsiveness, numbing, or detachment, derealization, depersonalization, and amnesia for aspects of the event. If persistent, it may become posttraumatic stress disorder.
Medical dictionary.
2011.