The cause of this disorder is typically an extremely stressful event or trauma.
Presence of psychotic symptoms (delusions, hallucinations, disorganized speech, and/or disorganized behavior) which lasts at least one day but no more than one month.
Supportive therapy or interpersonal relationships and at times medication.
Very good. By definition, the disorder will resolve itself within one month. If the symptoms last more than one month, the diagnosis needs to be reconsidered as does prognosis.