There is no clear cause to how certain patients with<unk>  develop<unk>  while others may surpass this stage. However, there are a few theories as to possible causes. Those suffering from<unk>  often suffer from social isolation due to their illness, which may increase<unk>  levels. There is strong evidence of stigma-related isolation against those suffering from mental illnesses in a variety of societies, especially those with<unk>  as they are often viewed as dangerous and unpredictable. Because of this isolation and studies linking social isolation and<unk> , it is possible that patients under these stigmas eventually develop<unk> .<unk>  in patients with<unk>  may also be caused by substance abuse, which is fairly common among those suffering from<unk> , as depressants such as alcohol and cannabis can relax the patient. Furthermore, with what little information is currently known about<unk> , the onset may be caused by not giving patients with<unk>  antipsychotic medications. After being taken off of antipsychotic medication,<unk>  patients' antidepressant medication had to be increased, while those under antipsychotic medication reported suffering fewer depressive symptoms, further giving reason to believe that a lack of antipsychotic medication in earlier stages of<unk>  may lead to<unk> . However, some psychology professionals still push for the reduction of neuroleptic drugs, as there is a popular belief that<unk>  is caused by neuroleptic treatment. Therapists are also believed to engage the<unk>  in people with<unk> , having given too much psychotherapy after the patient had overcome their<unk>  symptoms.<unk>  itself should not be overlooked as a key player in causing<unk> , though. A study done over a two-year time period shadowing patients with<unk>  and monitoring their<unk>  was unable to locate possible triggers such as the ones previously listed, so it is possible the nature of<unk>  itself is the primary cause of<unk> .
Post-schizophrenic depression
Unitary psychosis
Substance-induced psychosis
Tardive psychosis
Brief psychotic disorder
Pseudoneurotic schizophrenia
Outline of bipolar disorder
Secondary mania