Paranoid personality disorder is a psychiatric condition in which a person has a long-term distrust and suspicion of others, but does not have a full-blown psychotic disorder such as
Personality disorder - paranoid
Causes, incidence, and risk factors
The causes of paranoid personality disorder are unknown. The disorder appears to be more common in families with psychotic disorders such as schizophrenia and delusional disorder, which suggests genes may be involved. However, environmental factors may play a role, as well.
The condition appears to be more common in men.