It is as if certain parts of their identity are sleeping, until triggered. At this point their normal consciousness changes, and a triggered sleeping part appears in the consciousness and in outward behavior of the individual. The part of the consciousness that usually runs the personality is not operating, therefore, the person appears very different from their 'usual' nature. In both moderate and severe dissociation, trauma or significant stress 'trigger' either the blankness, or change of personality. Both moderate and severely dissociative individuals suffer from Post Trauma Stress Disorder. .
Treatment involves helping individuals learn successful ways to manage their stress reactions.
EMDR and specific stress management strategies are most helpful to helping people with these symptoms. Treatment of stress for dissociation is a more intense therapy than standard 'stress management' treatment. It is important, if you do have this disorder, or suspect that you do, that you be evaluated by a specialist in this area to receive appropriate treatment.