Narcissistic personality disorder is a mental condition in which people have an inflated sense of their own importance, a deep need for excessive attention and admiration, troubled relationships, and a lack of empathy for others. But behind this mask of extreme confidence lies a fragile self-esteem that's vulnerable to the slightest criticism.
A narcissistic personality disorder causes problems in many areas of life, such as relationships, work, school or financial affairs. They may find their relationships unfulfilling, and others may not enjoy being around them.