There is no single cause of schizophrenia. As with other common chronic diseases, such as diabetes and heart disease, different factors acting together are thought to contribute to the development of schizophrenia.12
What are the causes of schizophrenia?
Genetic and environmental factors or brain injury around the time of birth, may be important.1,13 Each of these factors is thought to increase the risk of certain individuals experiencing psychotic symptoms, which may be triggered by a number of different life events and situations, such as the effects of social isolation and stress, particularly around early adulthood. Street drugs, including cannabis, have also been associated with the triggering of schizophrenia and temporary psychotic symptoms.1
Mental health experts agree that the symptoms of schizophrenia are due to problems in transferring and processing information within the brain [APA Clinical Guidelines, 2004].1 These problems happen when the normal communication between the nerve cells of the brain that occurs by release of chemicals is not working as it should.9