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Symptoms » Confusion
 

Confusion

Confusion: Introduction

Confusion: Mental confusion and impaired thinking. See free access online books about Confusion below. See detailed information below for a list of 725 causes of Confusion, including diseases and drug side effect causes.

» Review Causes of Confusion: full list

Causes of Confusion:

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

See full list of 725 causes of Confusion

» Review Causes of Confusion: full list

Causes of Types of Confusion:

Review the causes of these more specific types of Confusion:

Review causes of types of Confusion in more specific categories:

Review causes of more specific types of Confusion:

See full list of 14 types for Confusion

Confusion: Symptom Checker

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

Symptom Checker

Symptom Checker

See full list of 4133 Symptom Checker combinations related to Confusion

Confusion Treatments

Review information on Confusion Treatments.

Causes of General Symptom Types

Research the causes of these more general types of symptom:

Causes of Similar Symptoms to Confusion

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

Diagnostic Guides for Confusion

Medical Books Excerpts Read excertps from published book sections related to Confusion from the following published medical books for more detailed information about Confusion. Free access (no registration): read all online diagnostic book sections about Confusion

Medical Books Excerpts
  • DELIRIUM
  • "Algorithmic Diagnosis of Symptoms and Signs" (2003)
  • DEMENTIA
  • "Algorithmic Diagnosis of Symptoms and Signs" (2003)
  • Delirium
  • "In A Page: Pediatric Signs and Symptoms" (2007)
  • DELIRIUM
  • "Differential Diagnosis in Primary Care" (2007)
  • Agitation
  • "Handbook of Signs & Symptoms (Third Edition)" (2006)
  • Confusion
  • "Handbook of Signs & Symptoms (Third Edition)" (2006)
  • Dementia*
  • "A Pocket Manual of Differential Diagnosis" (1999)
  • Agitation
  • "Professional Guide to Signs & Symptoms (Fifth Edition)" (2006)
  • Confusion
  • "Professional Guide to Signs & Symptoms (Fifth Edition)" (2006)
  • Delirium
  • "The 10-Minute Diagnosis Manual: Symptoms and Signs in the Time-Limited Encounter" (2000)
  • Dementia
  • "The 10-Minute Diagnosis Manual: Symptoms and Signs in the Time-Limited Encounter" (2000)
  • Confusion
  • "The 10-Minute Diagnosis Manual: Symptoms and Signs in the Time-Limited Encounter" (2000)
  • Dementia
  • "Field Guide to Bedside Diagnosis" (2007)
  • Agitation
  • "Signs & Symptoms: A 2-in-1 Reference for Nurses" (2007)
  • Confusion
  • "Signs & Symptoms: A 2-in-1 Reference for Nurses" (2007)
  • Agitation
  • "Nursing: Interpreting Signs and Symptoms" (2007)
  • Confusion
  • "Nursing: Interpreting Signs and Symptoms" (2007)
  • DELIRIUM
  • "Differential Diagnosis in Primary Care" (2007)
 

Copyright notice for book excerpts: Copyright © 2008 Lippincott Williams & Wilkins. All rights reserved.

Diagnostic tests for Confusion:

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

See full list of 24 diagnostic tests for Confusion

Diagnosis Checklist: Questions your doctor may ask (and why!)

During a consultation, your doctor will use various techniques in their assessment of Confusion. Your doctor may ask several questions when assessing your condition. It is important to remember that your consultation is a two-way process and any extra information you can share with your doctor about your symptoms may help them with their diagnosis. Some of the questions your doctor may ask are listed below:

  • How long have you noticed the confusion? - to determine if acute or chronic. If acute in nature must consider delirium as possible cause of confusion. Delirium is an acute confusional state due to many causes e.g. infection, drug intoxication, alcohol withdrawal, liver failure, kidney failure, hypoxia, low blood sugar, stroke, heart attack or head injury.
  • At what time of the day is the confusion worse? - e.g. if symptoms are worse in the late afternoon and at night delirium ( acute confusional state) is most likely.
  • Is there insight concerning the confusion? - patients with cerebral arteriosclerosis e.g. stroke; depression or AIDS notice their confusion whereas patients with Alzheimer's disease are unaware of their confusion.
  • History of head injury? - may suggest subdural haematoma, extradural haematoma or concussion.
  • Medications? - certain medications may cause intoxication e.g. anticonvulsants, anticholinergics, anti-anxiety medications, opiates; or may cause confusion on drug withdrawal.
  • more questions...»

See Diagnosis Checklist for Confusion (17 listings)

Diagnosis Checklist: Associated symptoms your doctor may ask about (and why!)

Sometimes, other symptoms may be present and may help your doctor analyse your condition. The symptoms your doctor may ask about (in association with Confusion) may include:

  • Symptoms of dementia? - e.g. impaired memory, impaired judgement and thinking, impaired verbal fluency and impaired ability to perform complex tasks. Personality may change, impulse control may be lost and personal care deteriorates.
  • Symptoms of depression? - Depression may exhibit many of the features of an early dementia, especially memory impairment, slowed thinking and lack of spontaneity.
  • Fever? - can suggest any infection that may cause delirium or meningitis, encephalitis, brain abscess or brain hemorrhage.
  • Symptoms of stroke? - e.g. limb weakness or paralysis, facial muscle weakness or paralysis, difficulty with speech and swallow.
  • Headache? - may suggest brain cancer or acute stroke.
  • more symptoms...»

See Diagnosis Checklist for Confusion (17 listings)

Home Diagnostic Testing and Confusion

Home medical tests possibly related to Confusion:

Stories from Users for Confusion

Real-life user stories relating to Confusion:

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

Videos for Confusion

Speaking up for Alzheimer's

Speaking up for Alzheimer'sThe father of television personality Linda Dano experienced years of mental deterioration before he was diagnosed with Alzheimer's disease. Hear...

Alzheimer's: The Long Goodbye

Alzheimer's: The Long GoodbyeAlzheimer's disease is a common, but often misunderstood condition. Forgetfulness is just one small symptom of a larger, more complicated disease...

 

Causes of Alzheimer's

Causes of Alzheimer'sWhile the causes of Alzheimer's are still uncertain, many experts believe the key lies in understanding plaques and tangles, lesions and knots of...

Caregiver Stress

Caregiver StressIt's difficult to watch a loved one suffer from Alzheimer's and caring for them can be an intense challenge. Our panel of experts will...

 
See full list of 13 related videos

Patient Surveys for Confusion

Medications or substances causing Confusion:

The following drugs, medications, substances or toxins are some of the possible causes of Confusion 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.

See full list of 1046 medications causing Confusion

Drug interactions causing Confusion:

When combined, certain drugs, medications, substances or toxins may react causing Confusion 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.

  • Dymelor and alcohol interaction
  • Diabinese and alcohol interaction
  • Amaryl and alcohol interaction
  • Glucotrol and alcohol interaction
  • Glucotrol XL and alcohol interaction
  • DiaBeta and alcohol interaction
  • more interactions...»

See full list of 1771 drug interactions causing Confusion

Definitions of Confusion:

Confusion: A mental state in which reactions to environmental stimuli are inappropriate because the person is bewildered, perplexed, or unable to orientate herself or himself. [L. confusio, a confounding]
Source: Stedman's Medical Spellchecker, © 2006 Lippincott Williams & Wilkins. All rights reserved.

Organs affected by Confusion:

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

Detailed list of causes of Confusion

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

See full list of 725 causes of Confusion

How Common are these Causes of Confusion?

This information refers to the general prevalence and incidence of these diseases, not to how likely they are to be the actual cause of Confusion. Of the 725 causes of Confusion that we have listed, we have the following prevalence/incidence information:

  • 8 causes are "very common" diseases
  • 15 causes are "common" diseases
  • 10 causes are "uncommon" diseases
  • 1 causes are "rare" diseases
  • 31 causes are "very rare" diseases
  • 690 causes have no prevalence information.

See the analysis of the prevalence of 725 causes of Confusion

Conditions listing symptoms: Confusion:

The following list of conditions have 'Confusion' 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.

A

  • Abdominal Aneurysm ... confusion
  • Acanthamoeba infection ... confusion
  • Acanthamoeba infection of the central nervous system ... confusion
  • Aceruloplasminemia ... confusion
  • Acid-Base Imbalance ... confusion, delirium
  • Actinomycetales infection ... confusion
  • Acute Bokhoror ... confusion, delirium
  • Acute Disseminated Encephalomyelitis ... delirium
  • Acute fatty liver of pregnancy ... confusion
  • Acute liver failure ... delirium
  • Acute Pesticide poisoning - xylene ... confusion
  • Acute VE ... confusion, delirium
  • Acute Viliuisk Encephalitis ... confusion, delirium
  • Acute Viliuisk Encephalomyelitis ... confusion, delirium
  • Acute Vilyuisk Encephalitis ... confusion, delirium
  • Acute Vilyuisk Encephalomyelitis ... confusion, delirium
  • Adverse reaction to chemical - 1-Propanol ... delirium
  • African Sleeping sickness ... Progressive confusion
  • Aging brain syndrome ... confusion
  • Alcohol drinking ... confusion
  • Alcohol Withdrawal ... delirium tremens
  • Alcohol-Induced Disorders ... delirium, confusion
  • Alcohol-induced pseudo-Cushing syndrome ... confusion
  • Alcoholic Neuropathy ... confusion
  • Alcoholism ... delirium tremens
  • Alzheimer disease 10 ... confusion
  • Alzheimer disease 12 ... confusion
  • Alzheimer disease 13 ... confusion
  • Alzheimer disease 14 ... confusion
  • Alzheimer disease 15 ... confusion
  • Alzheimer disease 16 ... Confusion
  • Alzheimer disease 2, late-onset ... Confusion
  • Alzheimer disease 3, (early-onset Alzheimer disease) ... Confusion
  • Alzheimer disease 5 ... confusion
  • Alzheimer disease 6 ... confusion
  • Alzheimer disease 7 ... confusion
  • Alzheimer disease 8 ... confusion
  • Alzheimer disease 9 ... confusion
  • Alzheimer disease type 1 ... confusion
  • Alzheimer disease type 2 ... confusion
  • Alzheimer disease type 4 ... confusion
  • Alzheimer disease, early-onset, with cerebral amyloid angiopathy ... Confusion
  • Alzheimer disease, familial ... confusion
  • Alzheimer disease, familial, 1 ... confusion
  • Alzheimer disease, familial, 11 ... Confusion
  • Alzheimer disease, familial, 3, with spastic paraparesis and apraxia ... Confusion
  • Alzheimer disease, familial, 3, with spastic paraparesis and unusual plaques ... Confusion
  • Alzheimer disease, familial, 4 ... Confusion
  • Alzheimer disease, familial, type 3 ... confusion
  • Alzheimer's Disease ... confusion
  • Alzheimer's disease without Neurofibrillary tangles ... confusion
  • Ambien overdose ... confusion
  • Ambien withdrawal ... confusion
  • Aneurysm, intracranial berry ... confusion
  • Aneurysm, intracranial berry, 1 ... confusion
  • Aneurysm, intracranial berry, 2 ... confusion
  • Aneurysm, intracranial berry, 3 ... confusion
  • Aneurysm, intracranial berry, 4 ... confusion
  • Aneurysm, intracranial berry, 5 ... confusion
  • Aneurysm, intracranial berry, 6 ... confusion
  • Aneurysm, intracranial berry, 7 ... confusion
  • Aneurysm, intracranial berry, 8 ... confusion
  • Anoxemia ... confusion
  • Anticholinergic syndrome ... delirium
  • Aorta-pulmonary artery fistula ... confusion
  • Apallic syndrome ... unresponsive
  • Appian-Plutarch syndrome ... confusion, delirium
  • Arbovirosis ... confusion
  • Argentinean hemorrhagic fever ... delirium
  • Ativan overdose ... mental confusion, confusion
  • Autoimmune Hepatitis ... mental confusion
  • Autoimmune limbic encephalitis ... confusion
  • Azotemia, famial ... confusion

    B

  • Back tumour ... confusion
  • Baneberry poisoning ... confusion
  • Basal ganglia disease, biotin-responsive ... confusion
  • Basilar artery insufficiency syndrome ... confusion
  • Benign astrocytoma ... confusion
  • Bing-Neel syndrome ... confusion
  • Blood cancer ... confusion, delirium
  • Bolivian hemorrhagic fever ... delirium
  • Box thorn poisoning ... delirium
  • Brain Concussion ... confusion
  • Brill disease ... delirium
  • Bristowe's syndrome ... confusion
  • Bubonic plague ... delirium
  • Burnett's milk drinker's syndrome ... confusion
  • Burnett's syndrome ... confusion

    C

  • Carcinomatous meningitis ... confusion
  • Carnitine transporter deficiency ... confusion
  • Catastrophic Antiphospholipid Syndrome ... confusion
  • Central nervous system lymphoma, primary ... confusion
  • Central nervous system oxygen toxicity ... confusion
  • Cerebellar abscess ... confusion
  • Cerebral abscess ... confusion
  • Cerebral astrocytoma, adult ... confusion
  • Chemical poisoning - 2,4-Dinitrotoluene ... confusion
  • Chemical poisoning - 4,4-Methylenebis ... confusion
  • Chemical poisoning - 4-Aminopyridine ... confusion
  • Chemical poisoning - Acetylsalicylic Acid ... confusion
  • Chemical poisoning - Acrylamide ... confusion
  • Chemical poisoning - Adiponitrile ... mental confusion
  • Chemical poisoning - Aldicarb ... confusion
  • Chemical poisoning - Aniline ... confusion
  • Chemical poisoning - Azinphos-methyl ... confusion
  • Chemical poisoning - Boric Acid ... confusion
  • Chemical poisoning - Bromethalin ... confusion
  • Chemical poisoning - Bromide ... confusion
  • Chemical poisoning - Bromophos ... confusion
  • Chemical poisoning - Butyl Alcohol ... confusion
  • Chemical poisoning - Camphor ... confusion
  • Chemical poisoning - Carbaryl ... mental confusion, confusion
  • Chemical poisoning - Carbon Tetrachloride ... confusion, delirium
  • Chemical poisoning - Chlordane ... confusion, delirium
  • Chemical poisoning - Chloromethane ... confusion
  • Chemical poisoning - Chlorpyrifos ... confusion
  • Chemical poisoning - Coumaphos ... confusion
  • Chemical poisoning - Cresols ... confusion
  • Chemical poisoning - Cresylic acid ... confusion
  • Chemical poisoning - Cyclohexanone ... confusion
  • Chemical poisoning - DDD ... confusion
  • Chemical poisoning - DDT ... confusion
  • Chemical poisoning - Demeton-S-methyl ... confusion
  • Chemical poisoning - Diazinon ... confusion
  • Chemical poisoning - Dibromochloromethane ... confusion
  • Chemical poisoning - Dichlorvos ... confusion
  • Chemical poisoning - Dicrotophos ... confusion
  • Chemical poisoning - Dieldrin ... mental confusion
  • Chemical poisoning - Diethylene Glycol ... confusion
  • Chemical poisoning - Dinitrocresol ... confusion
  • Chemical poisoning - Dioxathion ... confusion
  • Chemical poisoning - Disulfiram ... confusion
  • Chemical poisoning - Disulfoton ... confusion
  • Chemical poisoning - Endosulfan ... confusion
  • Chemical poisoning - Ethion ... confusion
  • Chemical poisoning - Ethylene Glycol Dinitrate ... delirium
  • Chemical poisoning - Fensulfothion ... confusion
  • Chemical poisoning - Fenthion ... confusion
  • Chemical poisoning - Gasoline ... confusion
  • Chemical poisoning - Glaze ... confusion
  • Chemical poisoning - Glycol Ether ... confusion
  • Chemical poisoning - High Melting Explosive (HMX) ... confusion
  • Chemical poisoning - Hydrazine ... confusion
  • Chemical poisoning - Hydroquinone ... delirium
  • Chemical poisoning - Isofenphos ... mental confusion
  • Chemical poisoning - Jet Fuel-4 ... confusion
  • Chemical poisoning - Jet Fuel-5 ... confusion
  • Chemical poisoning - Kerosene ... confusion
  • Chemical poisoning - Lysergic Acid Diethylamide ... delirium
  • Chemical poisoning - Malathion ... confusion
  • Chemical poisoning - Methidathion ... confusion
  • Chemical poisoning - Methiocarb ... confusion
  • Chemical poisoning - Methomyl ... confusion
  • Chemical poisoning - Metobromuron ... confusion
  • Chemical poisoning - N,N-Dimethyl-P-Toluidine ... confusion
  • Chemical poisoning - Naphthalene ... confusion
  • Chemical poisoning - Nickel Carbonyl ... delirium
  • Chemical poisoning - Nitrobenzene ... confusion
  • Chemical poisoning - Nitroglycerin ... confusion, delirium
  • Chemical poisoning - Nitrophenol ... confusion
  • Chemical poisoning - Nitrophenol Urea ... confusion
  • Chemical poisoning - Oil-based paint ... confusion
  • Chemical poisoning - Parathion ... confusion
  • Chemical poisoning - Phencyclidine ... delirium
  • Chemical poisoning - Phosdrin ... confusion
  • Chemical poisoning - Phosphine ... confusion
  • Chemical poisoning - Profenofos ... confusion
  • Chemical poisoning - Propane ... confusion
  • Chemical poisoning - Propoxur ... confusion
  • Chemical poisoning - Propylene Glycol Dinitrate ... confusion
  • Chemical poisoning - Terbufos ... confusion
  • Chemical poisoning - Tetrachloroethane ... confusion
  • Chemical poisoning - Tetraethyl Pyrophosphate ... confusion
  • Chemical poisoning - Thallium ... delirium
  • Chemical poisoning - Thallium Sulfate ... delirium
  • Chemical poisoning - Thiram ... confusion
  • Chemical poisoning - Toluene ... confusion
  • Chemical poisoning - Trichlorfon ... confusion
  • Chicken soup poisoning ... delirium
  • Christmas Cherry poisoning ... delirium
  • Cirrhosis of the liver ... unresponsiveness
  • Citrullinemia ... confusion
  • Citrullinemia II ... confusion
  • Classic migraine ... confusion
  • Cocaine abuse ... delirium
  • Cocaine addiction ... confusion
  • Coenzyme Q cytochrome c reductase deficiency of ... mental confusion
  • Colchicine toxicity ... confusion, delirium
  • Concussion ... mental confusion, confusion
  • Congenital hepatic porphyria ... delirium
  • Congenital nonhemolytic jaundice ... confusion
  • Cope's syndrome ... confusion
  • Corn Lily poisoning ... confusion
  • Crack addiction ... confusion
  • Creutzfeldt-Jakob Disease ... confusion
  • Crigler-Najjar syndrome, type 1 ... confusion
  • Cryptococcal Meningitis ... confusion
  • Cryptococcosis ... confusion
  • Cysticercosis ... confusion

    D

  • D'Acosta ... confusion
  • Daphne poisoning ... delirium
  • Darvocet overdose ... confusion
  • Defibrination syndrome ... Confusion
  • Dehydration ... confusion
  • Delirium ... confusion
  • Delirium tremens ... delirium
  • Dementia ... confusion, becoming lost in familiar places
  • Dementia With Lewy Bodies ... acute confusion
  • Demerol overdose ... confusion
  • Dentatorubral Pallidoluysian Atrophy ... confusion
  • Devil's trumpet poisoning ... delirium
  • Dexedrine overdose ... confusion
  • Dextromethorphan toxicity ... confusion
  • Diabetic hypoglycemia ... confusion
  • Diabetic Ketoacidosis ... confusion
  • Dilaudid overdose ... confusion
  • Dilutional hyponatremia ... confusion
  • Disequilibrium syndrome ... confusion
  • Dissociative Amnesia ... Confusion
  • Dissociative disorder ... Confusion
  • Dissociative Identity Disorder ... Confusion
  • Dobriner syndrome ... confusion
  • Down's Syndrome associated Alzheimer's disease ... Confusion
  • Drug Allergies ... confusion
  • Dysbarism ... confusion

    E

  • Early-onset Alzheimer's ... Confusion
  • East African Trypanosomiasis ... Progressive confusion
  • Ecstasy addiction ... confusion
  • Ecstasy overdose ... delirium
  • Ehrlichiosis ... confusion
  • Electrolyte abnormality ... confusion, delirium
  • Elephant's-ear poisoning ... delirium
  • Encephalitis ... confusion, poor responsiveness
  • End Stage Liver Failure ... delirium, confusion
  • End-stage renal disease ... confusion
  • Epidemic typhus ... delirium
  • Epidermoid carcinoma ... confusion
  • Episodic ataxia, type 6 ... confusion

    F

  • Familial Forms of Alzheimer's Disease ... Confusion
  • Familial hypertension ... confusion
  • Fentanyl toxicity ... confusion
  • Flea-borne diseases ... Delirium
  • Foxglove poisoning ... delirium, confusion
  • Functioning pancreatic endocrine tumor ... confusion
  • Fungal meningitis ... confusion

    G

  • Grand mal seizures ... confusion
  • Granulomatous amebic encephalitis ... confusion
  • Gräsbeck-Imerslund disease ... confusion

    H

  • Hallervorden-Spatz disease ... confusion
  • Hashimoto's encephalitis ... confusion
  • Head Conditions ... Confusion
  • Head injury ... confusion
  • Headache ... Confusion
  • Hemiplegic migraine, familial type 1 ... confusion
  • Hemiplegic migraine, familial type 2 ... confusion
  • Herbal Agent adverse reaction - Pennyroyal Oil ... confusion, delirium
  • Herbal Agent overdose - Wormwood ... delirium
  • Hereditary carnitine deficiency ... confusion
  • Hereditary carnitine deficiency syndrome ... confusion
  • Hereditary carnitine deficiency syndrome, systemic ... confusion
  • Heroin dependence ... confusion
  • High altitude cerebral edema ... confusion
  • Hip cancer ... confusion
  • HIV-1, CRF01_AE ... confusion
  • HIV-1, CRF02_AG ... confusion
  • HIV-1, CRF04_ cpx ... confusion
  • HIV-1, CRF05_ D/F ... confusion
  • HIV-1, CRF06_cpx ... confusion
  • HIV-1, CRF07_BC ... confusion
  • HIV-1, CRF08_BC ... confusion
  • HIV-1, CRF11_cpx ... confusion
  • HIV-1, CRF12_BF ... confusion
  • HIV-1, CRF13_cpx ... confusion
  • HIV-1, CRF14_BG ... confusion
  • HIV-1, CRF15_01B ... confusion
  • HIV-1, CRF16_ A2D ... confusion
  • HIV-1, CRF17_BF ... confusion
  • HIV-1, CRF18_cpx ... confusion
  • HIV-1, CRF19_cpx ... confusion
  • HIV-1, CRF20_BG ... confusion
  • HIV-1, CRF21_A2D ... confusion
  • HIV-1, CRF22_01A1 ... confusion
  • HIV-1, CRF23_BG ... confusion
  • HIV-1, CRF24_BG ... confusion
  • HIV-1, CRF25_cpx ... confusion
  • HIV-1, CRF26_AU ... confusion
  • HIV-1, CRF27_cpx ... confusion
  • HIV-1, CRF28_BF ... confusion
  • HIV-1, CRF29_BF ... confusion
  • HIV-1, CRF30_0206 ... confusion
  • HIV-1, CRF31_BC ... confusion
  • HIV-1, CRF32_06A1 ... confusion
  • HIV-1, CRF33_01B ... confusion
  • HIV-1, CRF34_01B ... confusion
  • HIV-1, CRF35_AD ... confusion
  • HIV-1, CRF36_cpx ... confusion
  • HIV-1, CRF37_cpx ... confusion
  • HIV-1, CRF38_BF ... confusion
  • HIV-1, CRF39_BF ... confusion
  • HIV-1, CRF40_BF ... confusion
  • HIV-1, CRF41_CD ... confusion
  • HIV-1, CRF42_BF ... confusion
  • HIV-1, CRF43_02G ... confusion
  • HIV-1A ... confusion
  • HIV-1A1 ... confusion
  • HIV-1A2 ... confusion
  • HIV-1A3 ... confusion
  • HIV-1B ... confusion
  • HIV-1C ... confusion
  • HIV-1D ... confusion
  • HIV-1E ... confusion
  • HIV-1F ... confusion
  • HIV-1F1 ... confusion
  • HIV-1F2 ... confusion
  • HIV-1G ... confusion
  • HIV-1H ... confusion
  • HIV-1J ... confusion
  • HIV-1K ... confusion
  • HIV-1M ... confusion
  • HIV-1N ... confusion
  • HIV-1O ... confusion
  • HIV-2 ... confusion
  • HIV-2A ... confusion
  • HIV-2B ... confusion
  • HIV/AIDS ... confusion
  • Hoigné syndrome ... confusion
  • Human granulocytic ehrlichiosis ... confusion
  • Human monocytic ehrlichiosis ... confusion
  • Hydrocodone overdose ... confusion
  • Hypercalcemia ... confusion
  • Hyperemesis Gravidarum ... confusion
  • Hyperglycemic Hyperosmolar Nonketotic Syndrome ... Mental confusion
  • Hyperinsulinism due to glucokinase deficiency ... confusion
  • Hyperinsulinism due to glutamodehydrogenase deficiency ... confusion
  • Hyperinsulinism in children, congenital ... confusion
  • Hyperornithinemia-hyperammonemia-homocitrullinuria syndrome ... confusion
  • Hyperoxia ... confusion
  • Hyperparathyroidism ... confusion, delirium
  • Hypertension ... confusion
  • Hypoglycemia ... confusion
  • Hypoglycemic attack ... confusion
  • Hypomagnesemia primary ... confusion
  • Hyponatremia ... confusion
  • Hypothermia ... confusion
  • Hypovolemia ... confusion

    I

  • Imerslünd-Grasbeck Syndrome ... confusion
  • Immunosuppressive Measles Encephalitis ... confusion
  • Impramine toxicity ... confusion
  • Inborn urea cycle disorder ... delirium
  • Insulinoma ... confusion
  • Intracranial arachnoid cysts ... confusion

    J

  • Japanese pagoda tree poisoning ... delirium
  • Jaundice ... confusion

    K

  • Kentucky coffee tea poisoning ... confusion
  • Kidney stones ... confusion
  • King Cobra poisoning ... confusion

    L

  • Late-onset Alzheimer's ... Confusion
  • Lead poisoning ... confusion
  • Legionella adelaidensis infection ... confusion
  • Legionella anisa infection ... confusion
  • Legionella beliardensis infection ... confusion
  • Legionella birminghamensis infection ... confusion
  • Legionella bozemanii infection ... confusion
  • Legionella bruneiensis infection ... confusion
  • Legionella brunensis infection ... confusion
  • Legionella busanensis infection ... confusion
  • Legionella cherrii infection ... confusion
  • Legionella cincinnatiensis infection ... confusion
  • Legionella donaldsonii infection ... confusion
  • Legionella donaldsonil infection ... confusion
  • Legionella drancourtii infection ... confusion
  • Legionella drozanskii infection ... confusion
  • Legionella dumofii infection ... confusion
  • Legionella erythra infection ... confusion
  • Legionella fairfieldensis infection ... confusion
  • Legionella fallonii infection ... confusion
  • Legionella feelei infection ... confusion
  • Legionella feeleii infection ... confusion
  • Legionella gesstiana infection ... confusion
  • Legionella gormanii infection ... confusion
  • Legionella gratiana infection ... confusion
  • Legionella gresilensis infection ... confusion
  • Legionella hackeliae infection ... confusion
  • Legionella impletisoli infection ... confusion
  • Legionella isrealensis infection ... confusion
  • Legionella jamestowniensis infection ... confusion
  • Legionella jordanis infection ... confusion
  • Legionella lansingensis infection ... confusion
  • Legionella londinensis infection ... confusion
  • Legionella longbeachae infection ... confusion
  • Legionella lytica infection ... confusion
  • Legionella maceachemii infection ... confusion
  • Legionella maceachernii infection ... confusion
  • Legionella micdadei infection ... confusion
  • Legionella monrovica infection ... confusion
  • Legionella moravica infection ... confusion
  • Legionella nautarum infection ... confusion
  • Legionella oakridgensis infection ... confusion
  • Legionella parisiensis infection ... confusion
  • Legionella quateirensis infection ... confusion
  • Legionella quinlivanii infection ... confusion
  • Legionella rowbothamii infection ... confusion
  • Legionella rubrilucens infection ... confusion
  • Legionella sainthelensi infection ... confusion
  • Legionella santicrucis infection ... confusion
  • Legionella shakespearei infection ... confusion
  • Legionella spiritensis infection ... confusion
  • Legionella steigerwaltii infection ... confusion
  • Legionella tauriensis infection ... confusion
  • Legionella tusconensis infection ... confusion
  • Legionella wadsorthii infection ... confusion
  • Legionella wadsworthii infection ... confusion
  • Legionella waltersii infection ... confusion
  • Legionella worsliensis infection ... confusion
  • Legionella yabuuchiae infection ... confusion
  • Legionnaires' disease ... confusion, delirium
  • Leukemia ... confusion
  • Leukoencephalopathy ... confusion
  • Lhermitte-McAlpine syndrome ... delirium, confusion
  • Lily-of-the-Valley poisoning ... confusion
  • Limbic encephalitis ... confusion
  • Limbic encephalitis - neuromyotonia - hyperhidrosis - polyneuropathy ... confusion
  • Listeriosis ... confusion
  • Liver failure ... confusion
  • Lortab overdose ... confusion
  • Lymphocytic Choriomeningitis ... confusion
  • Lysteria monocytoigeneses meningitis ... confusion

    M

  • Malaria ... delirium
  • Marburg virus ... delirium
  • Marijuana abuse ... confusion
  • Marijuana addiction ... mental confusion
  • Marijuana overdose ... delirium
  • Measles Encephalitis in Children with Immunosuppression ... confusion
  • Megaloblastic Anemia 1 ... confusion
  • Melioidosis ... confusion
  • Meningitis ... alertness changes, confusion, confusion
  • Meningococcal disease ... alertness changes, confusion, delirium
  • Menopause ... confusion
  • Mercury poisoning - consumption of contaminated fish ... mental confusion, delirium
  • Mercury poisoning - Folk Remedies ... mental confusion, delirium
  • Metabolic Acidosis ... mental confusion
  • Metastatic insulinoma ... confusion
  • Methadone overdose ... confusion
  • Methamphetamine overdose ... confusion
  • Methylmalonicacidemia with homocystinuria, cbl D ... delirium, confusion
  • Microcephaly brain defect spasticity hypernatremia ... unresponsiveness
  • Migraine ... confusion
  • Migrainous stupor migraine ... confusion
  • Milk poisoning ... confusion
  • Milk-Alkali syndrome ... confusion
  • Mixed connective tissue disease ... Delirium
  • Monkshood poisoning ... confusion
  • Morphine toxicity ... confusion
  • Multi-Infarct Dementia ... confusion
  • Multiple Myeloma ... confusion
  • Mustard tree poisoning ... confusion

    N

  • N-acetyl glutamate synthetase deficiency ... confusion
  • Naegleria ... confusion
  • Narcotic addiction ... confusion
  • Neurocysticercosis ... confusion
  • Neuroleptic Malignant Syndrome ... delirium
  • Neurosarcoidosis ... confusion
  • Neurosyphilis ... mental confusion
  • Nipah virus encephalitis ... mental confusion
  • Nocardiosis ... confusion
  • Nonaffective Psychosis ... Confusion
  • Nutritional deficiency ... Confusion

    O

  • Oleander poisoning ... delirium
  • Opioid addiction ... confusion
  • Opioid toxicity ... confusion
  • Opium addiction ... confusion
  • Opium overdose ... confusion
  • Ornithine transcarbamylase (OTC) Deficiency ... confusion
  • Ornithine Transcarbamylase Deficiency ... confusion
  • Oxycontin addiction ... confusion
  • Oxycontin overdose ... confusion

    P

  • Pain killer addiction ... confusion
  • Paraneoplastic Autoimmune Syndromes ... Confusion
  • Paraneoplastic limbic encephalitis ... confusion
  • Pediatric AIDS ... confusion
  • Pellagra ... confusion
  • Pellagra-like syndrome ... confusion
  • Percocet overdose ... confusion
  • Periorbital Cellulitis ... confusion/delirium
  • Persistent Vegetative State ... lack of awareness of the environment, lack of response
  • Pfiesteria piscicida infection ... confusion
  • Phenytoin toxicity ... mental confusion
  • Plague ... delirium
  • Plant poisoning - Amygdalin ... mental confusion
  • Plant poisoning - Angel's trumpet (D. suaveolans) ... delirium
  • Plant poisoning - Cyanogenic glycoside ... mental confusion
  • Plant poisoning - Digitalis glycoside ... confusion, delirium
  • Plant poisoning - Hydroquinone ... delirium
  • Plant poisoning - Jimsonweed (Datura stramonium) ... delirium
  • Plant poisoning - Lobeline ... mental confusion
  • Plant poisoning - potato (Solanum tuberosum) ... delirium
  • Plasma cell leukemia ... mental confusion
  • Pneumonia caused by serotype O11 Pseudomonas Aeruginosa ... mental confusion
  • Pneumonia, Aspiration ... mental confusion
  • Pneumonia, Bacterial ... mental confusion
  • Pneumonia, Staphylococcal ... mental confusion
  • Pneumonia, Viral ... mental confusion
  • Poisoning ... Confusion, Delirium
  • Postoperative haemorrhage ... Confusion
  • Postoperative respiratory failure ... Confusion
  • Postoperative septicaemia ... Confusion
  • Prescribed medication addiction ... confusion
  • Primary amebic meningoencephalitis ... confusion
  • Prion diseases ... confusion
  • Problem Sleepiness ... slow response
  • Psychiatric disorders ... Confusion
  • Psychological disorders ... Confusion
  • Pyridoxine deficiency ... confusion

    Q

  • Q fever ... confusion

    R

  • Rabies ... confusion, delirium
  • Respiratory acidosis ... confusion
  • Respiratory alkalosis ... confusion
  • Reye's Syndrome ... confusion, delirium
  • Rib Tumor ... confusion
  • Right hemisphere syndrome ... confusion
  • Right parietal lobe syndrome related Alzheimer's disease ... Confusion
  • Ritalin overdose ... confusion
  • Rocky Mountain spotted fever ... confusion, delirium

    S

  • Schizoaffective disorder ... Confusion, Delirium
  • Secondary Bone Cancer ... confusion
  • Selective Vitamin B12 malabsorption with Proteinuria ... confusion
  • Sepsis ... Confusion
  • Serotonin Syndrome ... delirium
  • Serotoninergic syndrome ... confusion
  • Shock ... confusion
  • Shock, Cardiogenic ... confusion
  • Shock, Distributive ... confusion
  • Shock, Endocrine ... confusion
  • Shock, Hemorrhagic ... confusion
  • Shock, Hypovolaemic ... confusion
  • Shock, Neurogenic ... confusion
  • Shock, Obstructive ... confusion
  • Shock, Septic ... confusion
  • Shock, Traumatic ... confusion
  • SIADH ... confusion
  • Sick sinus syndrome ... confusion
  • Sleeping pill addiction ... confusion
  • Slowly Progressive Bokhoror ... confusion
  • Slowly Progressive VE ... confusion
  • Slowly Progressive Viliuisk Encephalitis ... confusion
  • Slowly Progressive Viliuisk Encephalomyelitis ... confusion
  • Slowly Progressive Vilyuisk Encephalitis ... confusion
  • Slowly Progressive Vilyuisk Encephalomyelitis ... confusion
  • Snake bite ... Confusion
  • Spleen conditions ... Confusion
  • Stachybotrys chartarum ... confusion
  • Staphylococcal infection ... Confusion
  • Streptococcal Group A invasive disease ... confusion
  • Streptococcal Group B invasive disease ... confusion
  • Streptococcal Toxic Shock Syndrome ... confusion
  • Stroke ... confusion
  • Subarachnoid hemorrhage ... confusion
  • Subdural hematoma ... confusion
  • Sundown syndrome ... confusion
  • Surgical foreign body ... Confusion
  • Syphilitic aseptic meningitis ... Confusion

    T

  • Texas Mescalbean poisoning ... delirium
  • Thallium poisoning ... Delirium
  • Thrombotic thrombocytopenic purpura, acquired ... confusion
  • Thrombotic thrombocytopenic purpura, congenital ... confusion
  • Tick-borne encephalitis ... confusion
  • Timme syndrome ... confusion
  • Togaviridae disease ... confusion
  • Tolterodine toxicity ... confusion, delirium
  • Toxemia ... Confusion
  • Toxic mushrooms - Anticholinergic ... delirium
  • Toxic mushrooms - Monomethylhydrazine ... delirium
  • Toxic Shock Syndrome ... confusion
  • Toxoplasmosis ... confusion
  • Tramadol toxicity ... confusion
  • Tranquilizer addiction ... confusion
  • Transient Ischemic Attack ... confusion
  • Traumatic Brain Injury ... confusion
  • Traumatic spreading depression syndrome ... confusion
  • Trypanosomiasis, east-African ... confusion
  • Typhoid fever ... delirium

    U

  • Unconsciousness ... unresponsiveness
  • Urea Cycle Disorders ... Delirium

    V

  • Vancomycin resistant enterococcal bacteremia ... Delirium, Confusion
  • Venezuelan equine encephalitis ... confusion
  • Vicodin overdose ... unresponsiveness
  • Viral Hemorrhagic Fevers ... Delirium
  • Viral meningitis ... alertness changes, confusion

    W

  • Water Intoxication ... confusion
  • Waterhouse-Friderichsen syndrome ... Confusion
  • WDHA syndrome ... confusion
  • Weil's syndrome ... confusion
  • Wernicke's encephalopathy ... confusion
  • Wernicke-Korsakoff syndrome ... confusion
  • West African Trypanosomiasis ... Progressive confusion
  • Western equine encephalitis ... confusion
  • White snakeroot poisoning ... delirium

    X

  • Xanax overdose ... confusion

    Y

  • Yellow fever ... confusion, delirium

    Z

  • Zerres Rietschel Majewski syndrome ... Confusion
  • Zlotogora syndrome ... Confusion

    Conditions listing complications: Confusion:

    The following list of conditions have 'Confusion' or similar listed as a 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.

    A

  • Alcohol Withdrawal ... delirium tremens, delirium
  • Anoxia ... Mental confusion

    B

  • Bing-Neel syndrome ... delirium
  • Bubonic plague ... delirium

    C

  • Cirrhosis of the liver ... unresponsiveness

    G

  • Gangrene ... delirium
  • Gastroenteritis ... delirium

    H

  • Hyperparathyroidism ... delirium
  • Hypophosphatemia ... delirium

    S

  • Subarachnoid hemorrhage ... confusion

    T

  • Typhoid fever ... Confusion, delirium

    V

  • Viral Hemorrhagic Fevers ... delirium

    Y

  • Yellow fever ... delirium

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  • Causes of Confusion Based on Risk Factors

    This information shows analysis of the list of causes of Confusion 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 Confusion?

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

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

    Classifications of Confusion:

    Subtypes of Confusion:

    Progressive confusion (3 causes), Delirium (100 causes), Delirium tremens (2 causes), Level of consciousness, decreased, Unresponsiveness (14 causes), Reduced alertness (5 causes)

    Medical Conditions associated with Confusion:

    Behavioral symptoms (3957 causes)

    Symptoms related to Confusion:

    Mental symptoms (2653 causes), Concentration difficulty (265 causes), Dementia (192 causes), Alzheimers disease (1 cause), Forgetfulness (227 causes), Head trauma (1 cause)

    Medical articles on signs and symptoms:

    Doctor-patient articles related to symptoms and diagnosis:

    These general medical articles may be of interest:

    See full list of premium articles on symptoms and diagnosis

    Medical News summaries about Confusion

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

    News Archives for Confusion

    Medical news articles related to Confusion include:

    Source: HealthDay News

    More Ways To Research Medical Signs and Symptoms:


     » Next page: Causes of Confusion

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