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In reply to the discussion: Psychiatrist: Calling Donald Trump Mentally Ill Is An Insult To The Mentally Ill [View all]pnwmom
(110,171 posts)was first described in 1925.
He's also got it wrong when he said the diagnosis requires that the person be stressed AND impaired. It is only required that the person be either stressed OR impaired. Very few severe narcissists come in for treatment because they are not disturbed by their personality -- it only bothers the people close to them.
https://en.wikipedia.org/wiki/Narcissistic_personality_disorder
Narcissistic personality disorder is rarely the primary reason for people seeking mental health treatment. When people with NPD enter treatment, it is typically prompted by life difficulties or to seek relief from another disorder, such as major depressive disorder, substance use disorders, bipolar disorder, or eating disorders,[9] or at the insistence of relatives and friends. This is partly because individuals with NPD generally have poor insight and fail to recognize their perception and behavior as inappropriate and problematic due to their very positive self-image.[