The Mayo clinic defines Narcissistic Personality Disorder — as one of several types of personality disorders — as 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. Symptoms Signs and symptoms of narcissistic personality disorder and the severity of symptoms vary. People with the disorder can:   Have an exaggerated sense of self-importance Have a sense of entitlement and require constant, excessive admiration Expect to be recognized as superior even without achievements that warrant it Exaggerate achievements and talents Be preoccupied with fantasies about success, power, brilliance, beauty or the perfect mate Believe they are superior and can only associate with equally special people Monopolize conversations and belittle or look down on people they perceive as inferior Expect special favors and unquestioning compliance with their expectations Take advantage of others to get what they want Have an inability or unwillingness to recognize the needs and feelings of others Be envious of others and believe others envy them Behave in an arrogant…