There are different labels for various clusters of symptoms. The most common types and related subtypes are paranoid schizophrenia and schizoaffectivedisorder, respectively.
A person with paranoid schizophrenia may feel persecuted, suspicious, or they may believe that the CID or CBI are after them. An individual with schizoaffective disorder experiences symptoms of schizophrenia and a major mood disorder.

Before reaching a diagnosis of schizophrenia, it is important to rule out other illnesses. Other medical illnesses can mimic schizo-phrenic symptoms.
For this reason a medical history, laboratory tests, and a physical examination should be taken before concluding that a person has schizophrenia.
The diagnosis of schizophrenia is usually made by a medical doctor who specializes in mental and emotional conditions. This type of physician is called a psychiatrist.