The cause of<unk>  is unknown, but genetic, biochemical, and environmental factors may play a significant role in its development. Some people with<unk> s may have an imbalance in neurotransmitters, the chemicals that send and receive messages to the brain. There does seem to be some familial component, and immigration (generally for persecutory reasons), drug abuse, excessive stress, being married, being employed, low socioeconomic status, celibacy among men, and widowhood among women may also be risk factors.<unk>  is currently thought to be on the same spectrum or dimension as schizophrenia, but people with<unk> , in general, may have less symptomatology and functional disability.
Delusional disorder
Paranoid personality disorder
Externalizing disorder
Substance-induced psychosis
Internalizing disorder
Bipolar disorder
Dissociative disorder
Schizophrenia