Dear, If you have a look deeply into the scientific definition of the Narcissistic personality, you will find that the definition and the diagnostic criteria of Narcissistic personality disorder is a mental disorder in which people have an inflated sense of a deep need for admiration, a lack of empathy for others, and an inflated sense of a deep need for their own importance,. But behind this mask of high self- confidence lies a fragile self-esteem that's vulnerable to the slightest criticism. A narcissistic personality disorder usually causes problems in many areas of life, such as relationships, work, school or financial affairs. The Narcissistic person may be generally unhappy and disappointed when he or she not given the special favors, attention, or admiration he/she believes deserve. Others may not enjoy being around you, and you may find your relationships unfulfilling. However, some people might have Narcissistic personality traits not personality disorder, which means that these traits didn’t cause any deterioration in his or her social, occupational, educational achievements. Take care.