Confusion

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Confusion is a change in mental status in which a person is not able to think with his or her usual level of clarity. Frequently, confusion leads to the loss of ability to recognize people and or places, or tell time and the date. Feelings of disorientation are common in confusion, and decision-making ability is impaired.

Confusion may arise suddenly or develop gradually over time. Confusion has multiple causes, including injuries, medical conditions, medications, environmental factors, and substance abuse.

Patients may experience the related symptoms of Memory Loss, Altered Mental Status, and/or Paranoia.

Medically Reviewed by a Doctor on 2/24/2012

Health concern on your mind? Visit the Symptom Checker.

REFERENCE:

Fauci, Anthony S., et al. Harrison's Principles of Internal Medicine. 17th ed. United States: McGraw-Hill Professional, 2008.

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      In This Article
      Yellow Fever Article
      • Yellow fever facts
      • What is yellow fever? What is the history of yellow fever?
      • What causes yellow fever?
      • How is yellow fever transmitted?
      • What areas are high-risk for contracting yellow fever?
      • What is the incubation period for yellow fever?
      • What are yellow fever symptoms and signs?
      • How is yellow fever diagnosed?
      • What is the treatment for yellow fever?
      • What is the prognosis for people with yellow fever?
      • Can yellow fever be prevented?
      • Where can people get more information on yellow fever?
Other Causes of Confusion
  • Carbon Monoxide Exposure
  • Delirium
  • Dissociative Disorders
  • Electrolyte Imbalances
  • Head Injury
  • Hospitalization (Particularly in the Elderly)
  • Hypoxia (Decrease in Blood Oxygen) at High Altitude
  • Korsakoff Syndrome
  • Liver Failure
  • Medications
  • Nutritional Deficiencies
  • Psychotic Disorders
  • Sleep Deprivation
  • Toxins
  • Wernicke's Encephalopathy



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