Schizophrenia Schizophrenia is a very complex disorder in the brain. It is incurable, but treatable to live a close to a normal life. There are five different kinds of schizophrenia. They each have different symptoms. The positive and negative symptoms of schizophrenia are also easy to mistake for other diseases or disorders. There are many different treatments to improve this disorder, however they do produce side effects. Researchers believe there are many causes of schizophrenia. According to the Merriam Webster Medical Dictionary, schizophrenia is defined as “a psychotic disorder characterized by loss of contact with the environment, by notic