Acute Stress Disorder

The person has been exposed to a traumatic event in which both of the following were present:

The person experienced, witnessed, or was confronted with an event
    or events that involved actual or threatened death or serious injury, or
    a threat to the physical integrity of self or others.

The person's response involved intense fear, helplessness, or horror.

Either while experiencing or after experiencing the distressing event, the individual has three (or more) of the following dissociative symptoms:

A subjective sense of numbing, detachment, or absence of emotional
responsiveness.

A reduction in awareness of his or her surroundings (e.g., "being in a daze").

Depersonalization - dissociative amnesia (i.e., inability to recall an important aspect of the trauma).

The patient persistently re-experienced the traumatic event in at least one or
    more of the following ways: recurrent images, thoughts, dreams, illusions,
    flashback episodes, or a sense of reliving the experience; or distress on exposure
    to reminders of the traumatic event.

Marked avoidance of stimuli that arouse recollections of the trauma (e.g., thoughts,
    feelings, conversations, activities, places, people).

There are marked symptoms of anxiety or increased arousal (e.g., difficulty
   sleeping, irritability, poor concentration, hypervigilance, exaggerated startle
   response, motor restlessness).

At least 1of the following applies:

The patient feels marked distress from the symptoms.

They interfere with usual social, job or personal functioning.

They block the patient from doing something important such as getting legal or medical help or telling family or other supporters about the experience.

The disturbance lasts for a minimum of 2 days and a maximum of 4 weeks
   and occurs within 4 weeks of the traumatic event.

The disturbance is not due to the direct physiological effects of a substance
   (e.g., a drug of abuse, a medication) or a general medical condition, is not
    better accounted for by Brief Psychotic Disorder, and is not merely an
    exacerbation of a preexisting mental disorder.