Paranoid schizophrenia is a form of schizophrenia that causes individuals to experience delusions that other people are conspiring against them or persecuting them, explains PsychCentral. Paranoid schizophrenia patients are more likely to remain socially active and continue to function normally at work than those with other types of schizophrenia.
People with paranoid schizophrenia experience symptoms such as hallucinatory voices that give commands or threaten, according to PsychCentral. Patients may also exhibit delusions of persecution and extreme jealousy that may cause dangerous behaviors. Hallucinations often affect bodily sensations and the senses of smell and taste. Individuals with paranoid schizophrenia may also experience auditory hallucinations such as laughing, humming or whistling.
The symptoms of paranoid schizophrenia may not be outwardly noticeable to others at first, explains PsychCentral. Behaviors based on delusional thoughts are often the most noticeable, and the patient's mood may change suddenly. Often, a patient who feels persecuted may become hostile or easily angered when interacting with others.
The Diagnostic and Statistical Manual of Mental Disorders, published by the American Psychiatric Association, no longer differentiates between various forms of schizophrenia, such as the paranoid or catatonic subtype, states Mayo Clinic. The APA found that this differentiation was unreliable and that it didn't help mental health professionals decide on the best treatment for patients suffering from a certain subtype.