Narcissistic Personality Disorder (NPD) is a mental health condition characterized by a long-term pattern of exaggerated self-importance, a constant need for admiration and validation, and a lack of empathy for others. It falls under the category of Cluster B personality disorders in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), which is a widely used manual for diagnosing mental health disorders.

Here are some of the key characteristics and symptoms associated with Narcissistic Personality Disorder:

1. Grandiosity: Individuals with NPD often have an inflated sense of self-importance and believe that they are unique, special, and deserving of special treatment.

2. Fantasies of Success, Power, or Beauty: They may have unrealistic fantasies of unlimited success, power, brilliance, or physical attractiveness.

3. Need for Admiration: People with NPD require excessive admiration and validation from others. They constantly seek attention, praise, and approval.

4. Sense of Entitlement: Individuals with NPD often have a strong sense of entitlement and believe that they should receive preferential treatment or that others should cater to their needs and desires.

5. Exploitative Behavior: They may exploit others for personal gain, often without considering the feelings or needs of others.

6. Lack of Empathy: One of the hallmark features of NPD is a lack of empathy. People with NPD have difficulty recognizing and understanding the feelings and perspectives of others.

7. Envy and Belief that Others Are Envious: They may be envious of others and believe that others are envious of them.

8. Arrogance and Haughtiness: NPD individuals can come across as arrogant, condescending, and haughty in their interactions with others.

It's important to note that while many people may exhibit some narcissistic traits from time to time, NPD involves a pervasive and enduring pattern of behavior that causes distress and impairment in various areas of life, such as relationships, work, and overall functioning.

Diagnosis and treatment of NPD typically involve psychotherapy, such as cognitive-behavioral therapy (CBT) or dialectical behavior therapy (DBT). The goal of therapy is to help individuals with NPD develop healthier coping mechanisms, improve self-awareness, and build better interpersonal relationships. However, individuals with NPD may be resistant to treatment, as they often have difficulty acknowledging their own shortcomings or vulnerabilities.