Other mental disorders with similar symptoms include several that are related to schizophrenia:

Undifferentiated schizophrenia is a type of schizophrenia that is diagnosed when an individual meets the criteria for diagnosis of schizophrenia but cannot be classified into any of the five defined subtypes.

Undifferentiated-type schizophrenia is a classification used when a person exhibits behaviors which fit into two or more of the other types of schizophrenia, including symptoms such as delusions, hallucinations, disorganized speech or behavior, catatonic behavior.

• Brief psychotic disorder.
• Delusional disorder.
• Schizoaffective disorder.
• Schizophreniform disorder.
• Schizotypal personality disorder.

Schizophrenia is a mental illness that causes psychosis, but schizophrenia also has other symptoms. And it isn’t the only cause of psychosis. In some cases, other mental illnesses cause psychosis, including depression, bipolar disorder, dementia and borderline personality disorder.

Neurologists focused on those brain disorders with cognitive and behavioural abnormalities that also presented with somatic signs—stroke, multiple sclerosis, Parkinson’s, and so forth—while psychiatrists focused on those disorders of mood and thought associated with no, or minor, physical signs found in the …

Although some people with schizophrenia suffer anxiety, it is impossible for people with anxiety disorders to develop schizophrenia as a result of their anxiety disorder. Anxiety sufferers should be reassured that they cannot develop schizophrenia as part of their anxiety state, no matter how bad the anxiety becomes.

Schizophrenia and bipolar disorder are two mental illnesses associated with psychosis, but severe anxiety can trigger it as well. Some people who suffer from severe anxiety and have panic attacks or anxiety attacks as a result experience symptoms of psychosis.

In some people, schizophrenia appears suddenly and without warning. But for most, it comes on slowly, with subtle warning signs and a gradual decline in functioning, long before the first severe episode.

The main psychological triggers of schizophrenia are stressful life events, such as:

• bereavement.
• losing your job or home.
• divorce.
• the end of a relationship.
• physical, sexual or emotional abuse.