Personality disorders are a group of mental disorders that often co-occur with other mental illnesses such as substance abuse disorders, depression, bipolar disorder, and anxiety disorders. It is estimated that 10-13% of the world's population suffers from some form of personality disorder. Treatment of personality disorders requires a multidisciplinary approach, including psychotherapy.

Antisocial personality disorder is a deeply ingrained thought process that focuses on socially exploratory behaviors, leading to criminal behavior. The most obvious sign of antisocial personality disorder is that affected individuals do not feel remorse for these behaviors.