What is Narcissistic Personality Disorder? Narcissistic Personality Disorder (NPD) is a personality disorder in which the individual is engrossed in their own personal power, prestige and vanity. The disorder was named after a mythological Greek character called Narcissus who became infatuated and in love with his own reflection in a lake. As such, someone suffering with All content on Narcissistic Personality Disorder: What Is
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