The study of human personality or "character" (from the Greek charaktêr, the mark impressed upon a coin) dates back at least to antiquity. In his Characters, Tyrtamus (371-287 B.C.) — nicknamed ...

Cluster C personality disorders include conditions with anxious and fearful thoughts and behaviors. These are avoidant personality disorder (AVPD), dependent personality disorder (DPD), and ...

Narcissistic personality disorder (NPD) is 1 of 10 clinically recognized personality disorders. Though NPD is only one official diagnosis, doctors further classify the condition into 2 types.

The exact cause of personality disorders is unclear. However, genetics, neurological differences, and environmental factors may contribute to the development of these complex mental health conditions.

Most people with NPD have a distorted sense of self and lack empathy. People with NPD might seek relationships mainly to boost their self-esteem. Overt and covert are two main types of narcissistic ...

Genetics is just one of several factors thought to influence personality disorder development. Life experiences, family dynamics, coping mechanisms, and social learning may all be contributing factors ...