Narcissistic Personality Disorder (NPD) is characterized by an inflated sense of self-importance, a constant need for admiration, and a lack of empathy for others. Diagnosed through persistent patterns of behavior such as arrogance, entitlement, and manipulation, NPD significantly impacts personal and social relationships. Understanding NPD's genetic, environmental, and psychological roots aids in identifying and managing the disorder. Effective treatments include cognitive-behavioral therapy, psychodynamic therapy, and schema therapy, often complemented by medications for co-occurring conditions. For those who suffer from NPD, setting clear boundaries and seeking support are essential coping mechanisms.