The exact causes of schizophrenia are unknown. Research suggests a combination of physical, genetic, psychological and environmental factors can make a person more likely to develop the condition. Some people may be prone to schizophrenia, and a stressful or emotional life event might trigger a psychotic episode. However, it's not known why.
Schizophrenia is a serious and chronic mental illness that impairs a person's thoughts and behavior, and if untreated, can include psychosis. Psychology Today. Find a Therapist.