how is personality disorder causes
What causes personality disorders? Research suggests that genetics, abuse and other factors contribute to the development of obsessive-compulsive, narcissistic or other personality disorders. In the past, some believed that people with personality disorders were just lazy or even evil. Genetics. Researchers are beginning to identify some possible genetic factors behind personality disorders. One team, for instance, has identified a malfunctioning gene that may be a factor in obsessive-compulsive disorder.