Psychosis is usually caused by some kind of stress in vulnerable individuals. In BPD it is always due to interpersonal stress particularly abandonment which is overwhelming, since it is their biggest fear. Their identity is tied to the other (abandoning) person which adds to the stress. The symptoms recede after the abandonment has been resolved. If the psychotic symptoms occur for other reasons and are spontaneous, then they are probably due to another illness.
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Dx: Didgee Disorder
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