A highly stigmatized and misunderstood condition, narcissistic personality disorder (NPD) is never a personal choice.
Instead, it’s a complex mental health condition that goes beyond a few stereotypical behaviors or attitudes.
Can a person with narcissistic personality be vindictive? Yes. However, vindictiveness isn’t an official symptom of the disorder, nor is it exclusive of people living with mental health conditions.
Only a mental health professional can accurately diagnose narcissistic personality disorder.