Narcissistic personality disorder causes people to think about their diseases.
 It is most characteristic of obsessivecompulsive personality disorder; the opposite of it known as impulsivity (here: an aspect of openness that shows a tendency to behave unusually or autistically) is characteristic of schizotypal and borderline personality disorders
The symptoms are not due to the direct effects of a medication or substance, including withdrawal effects, and are not better accounted for by another mental disorder, a Disease of the Nervous System, or another medical condition

