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Delusions: Introduction

Chronic cases of hallucinations and delusions typify chronic psychiatric disorders such as schizophrenia and other delusional disorders. Delusions differ from hallucinations in that delusions refer to the mind's reasoning and thoughts, rather than its sensory inputs. For example, "delusions of grandeur" are typical in schizophrenia, where a patient may well truly believe that they are actually the leader of a country, or a reincarnation of someone important.

It is important to be precise about this symptom, and to dinstinguish true delusions from other symptoms such as paranoia, anxiety, fear, and other emotional states. Also, people have varying belief systems, and it's not always clear at what point a belief is valid, and at what point it becomes a "delusion"....more »

» Review Causes of Delusions: Causes | Symptom Checker » | Assessment Questionnaire »

Causes of Delusions:

The following medical conditions are some of the possible causes of Delusions. There are likely to be other possible causes, so ask your doctor about your symptoms.

» Review Causes of Delusions: Causes | Symptom Checker » | Assessment Questionnaire »

Home Diagnostic Testing and Delusions

Home medical tests possibly related to Delusions:

Causes of Types of Delusions:

Review the causes of these more specific types of Delusions:

Delusions: Symptom Checker

Listed below are some combinations of symptoms associated with Delusions, as listed in our database. Visit the Symptom Checker, to add and remove symptoms and research your condition.

Symptom Checker

Symptom Checker

Delusions Treatments

Review further information on Delusions Treatments.

Stories from Users for Delusions

Real-life user stories relating to Delusions:

Message Boards for Delusions

Symptom specific forums: The following patient stories in our interactive forums and message boards relate to Delusions or relevant symptoms:

Diagnostic tests for Delusions:

Various tests are used in the diagnosis of Delusions. Some of these are listed below :

  • Mental state examination - including appearance, behavior, rate and continuity of speech, mood, affect, thought content, evidence of any hallucinations or abnormal beliefs, orientation to time, place and person, attention and concentration, short-term memory, insight and judgement.
  • Physical examination
    • Does the person smell of alcohol
    • Temperature
    • Neck stiffness may suggest meningitis or subarachnoid hemorrhage
  • more tests...»

Medications or substances causing Delusions:

The following drugs, medications, substances or toxins are some of the possible causes of Delusions as a symptom. Always advise your doctor of any medications or treatments you are using, including prescription, over-the-counter, supplements, herbal or alternative treatments.

Drug interactions causing Delusions:

When combined, certain drugs, medications, substances or toxins may react causing Delusions as a symptom. Always advise your doctor of any medications or treatments you are using, including prescription, over-the-counter, supplements, herbal or alternative treatments.

Delusions: Comorbid Symptoms

Some of the comorbid or associated medical symptoms for Delusions may include these symptoms:

Causes of General Symptom Types

Research the causes of these more general types of symptom:

Causes of Similar Symptoms to Delusions

Research the causes of these symptoms that are similar to, or related to, the symptom Delusions:

Assessment Questionnaire: Questions your doctor may ask (and why!)

During a consultation, your doctor will use various techniques to assess the symptom: Delusions. These will include a physical examination and possibly diagnostic tests. (Note: A physical exam is always done, diagnostic tests may or may not be performed depending on the suspected condition) Your doctor will ask several questions when assessing your condition. It is important to openly share any pertinent information to help your doctor make an accurate diagnosis.

It is also very important to bring an up-to-date list of all of your all medical conditions, medications including dosages, and names of numbers of any specialist you see.

Create your printable checklist here.

See Delusions Assessment Questionnaire (29 listings)

Delusions: Deaths

Read more about causes and Delusions deaths.

Misdiagnosis and Delusions

Schizophrenia often has misdiagnosed hidden cause: The book "Preventing Misdiagnosis of Women" reports on a study citing that 83% of people with a diagnosis of schizophrenia actually had brain lesions (i.e. brain tumors) or temporal more »

Cushing's disease can be mistaken for depression: Cushing's disease (or similarly Cushing's syndrome) is a possible misdiagnosis for a person diagnosed with depression. It is an more »

Manic-depressive (bipolar) disorder often misdiagnosed: Bipolar disorder, also called manic-depressive disorder, is often misdiagnosed before reaching a correct diagnosis. Some of the common misdiagnoses include more »

Epilepsy misdiagnosed as schizophrenia: The book "Preventing Misdiagnosis of Women" reports on a case of a woman diagnosed with schizophrenia, but later diagnosed with a form of more »

Various mental health symptoms caused by rare epilepsy: Temporal lobe epilepsy is a less common form of epilepsy that does not have the typical physical more »

Rare seizure-less epilepsy misdiagnosed as various conditions: A complex partial seizure disorder, such as temporal lobe epilepsy can more »

Lupus is often misdiagnosed as other conditions: Systemic lupus erythematosus (SLE), often simply called "lupus", is a difficult disease to diagnose and can manifest with numerous symptoms. Some of the possible more »

Undiagnosed stroke leads to misdiagnosed aphasia: BBC News UK reported on a man who had been institutionalized and treated for mental illness because he suffered from sudden inability to speak. This was initially misdiagnosed as a "nervous breakdown" more »

Dementia may be a drug interaction: A common scenario in aged care is for a patient to show mental decline to dementia. Whereas this can, of course, occur due to various medical conditions, such as a more »

ADHD under-diagnosed in adults: Although the over-diagnoses of ADHD in children is a well-known controversy, the reverse side related to adults. Some more »

Bipolar disorder misdiagosed as various conditions by primary physicians: Bipolar disorder (manic-depressive disorder) often fails to be diagnosed correctly by primary more »

Eating disorders under-diagnosed in men: The typical patient with an eating disorder is female. The result is that men with eating disorders often fail to be diagnosed or have a delayed more »

Depression undiagnosed in teenagers: Serious bouts of depression can be undiagnosed in teenagers. The "normal" moodiness of teenagers can cause severe medical depression to be overlooked. See misdiagnosis of depression or more »

Undiagnosed anxiety disorders related to depression: Patients with depression (see symptoms of depression) may also have undiagnosed anxiety disorders (see symptoms of anxiety disorders). more »

Delusions: Research Related Doctors & Specialists

Other ways to find a doctor, or use doctor, physician and specialist online research services:

Hospitals & Clinics: Delusions

Research extensive quality ratings and patient safety measures for hospitals, clinics and medical facilities in health specialties related to Delusions:

Delusions: Related Rare Diseases

Rare types of medical conditions and diseases in related medical categories:

Delusions: Undiagnosed Conditions

Conditions that are commonly undiagnosed in related areas may include:

Organs affected by Delusions:

The list of organs typically affected by Delusions may include, but is not limited to:

Detailed list of causes of Delusions

The list below shows some of the causes of Delusions mentioned in various sources:

How Common are these Causes of Delusions?

This information refers to the general prevalence and incidence of these diseases, not to how likely they are to be the actual cause of Delusions. Of the 176 causes of Delusions that we have listed, we have the following prevalence/incidence information:

  • 5 causes are "very common" diseases
  • 5 causes are "common" diseases
  • 4 causes are "uncommon" diseases
  • 0 causes are "rare" diseases
  • 5 causes are "very rare" diseases
  • 163 causes have no prevalence information.

Conditions listing medical symptoms: Delusions:

The following list of conditions have 'Delusions' or similar listed as a symptom in our database. This computer-generated list may be inaccurate or incomplete. Always seek prompt professional medical advice about the cause of any symptom.

Select from the following alphabetical view of conditions which include a symptom of Delusions or choose View All.

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Conditions listing medical complications: Delusions:

The following list of medical conditions have Delusions or similar listed as a medical complication in our database. The distinction between a symptom and complication is not always clear, and conditions mentioning this symptom as a complication may also be relevant. This computer-generated list may be inaccurate or incomplete. Always seek prompt professional medical advice about the cause of any symptom.



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Causes of Delusions Based on Risk Factors

This information shows analysis of the list of causes of Delusions based on whether certain risk factors apply to the patient:

  • Travel - has the patient travelled recently?
  • Diabetes - history of diabetes or family history of diabetes?

    Doctors and specialists: Who should I consult about Delusions?

    Depending on the seriousness of the onset of Delusions, you may want to consult one of the following medical professionals.

    Important:In extreme cases, always seek advice from emergency services :

    Classifications of Delusions:

    Subtypes of Delusions:

    Paranoia (115 causes), Auditory hallucinations (48 causes), Hearing voices (7 causes), Abnormal thinking (6 causes), Severe paranoid reaction (5 causes)

    Medical Conditions associated with Delusions:

    Mental problems (3121 causes), Behavioral symptoms (4608 causes), Personality symptoms (4029 causes), Psychiatric symptoms (971 causes), Cognitive impairment (3664 causes)

    Symptoms related to Delusions:

    Paranoia (115 causes), Isolation (116 causes), Hearing voices (7 causes), Hallucinations (288 causes), Schizophrenia, Schizotypal personality disorder, Schizoid personality disorder, Psychotic episode, Brief psychotic disorder, Postpartum psychosis (4 causes), Depression (629 causes), Major depressive episode, Major depressive disorder

    Medical articles on signs and symptoms:

    Doctor-patient articles related to symptoms and diagnosis:

    These general medical articles may be of interest:

    Medical News summaries about Delusions

    Our news pages contain the following medical news summaries about Delusions and many other medical conditions:

    More Ways To Research Medical Signs and Symptoms:


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