These usually involve seeing or hearing things that don't exist. Criteria to diagnose schizophrenia The presence of two or more of the following symptoms for at least 30 days: Hallucinations.
If schizophrenia or another mental problem is the cause, getting treatment early will help.
People often have episodes of schizophrenia, during which their symptoms are particularly severe, followed by periods where they experience few or no symptoms. Symptoms associated with schizophrenia occur along a continuum in the population and must reach a certain severity and level of impairment before a diagnosis is made.
Related: Psychosis factsheet Non-psychotic symptoms The non-psychotic symptoms of schizophrenia tend to last much longer. That can be hard to spot, especially during an intense period like adolescence and early adulthood. Additionally, for people with a predisposition to a psychotic illness such as schizophrenia, usage of cannabis may trigger the first episode.
What are the causes schizophrenia? The disease may come and go in cycles of relapse and remission. In practice, agreement between the two systems is high. With the right treatment and self-helpmany people with schizophrenia are able to regain normal functioning and even become symptom-free.