Brain Fog

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Reviewed By:

Bret Mobley

Bret Mobley, MD, MS (Neuropathology)

Dr. Mobley graduated from the University of Michigan Medical School, completing a masters degree in neuroscience between his second and third years of medical school. He trained as a resident in pathology at Stanford University Hospital before joining the faculty of Vanderbilt University Medical Center in Nashville Tennessee in 2010. He was promoted to Associate Professor in 2018 and to Neuropathology Division Director in 2020.

Shohei Harase

Shohei Harase, MD (Neurology)

Dr. Harase spent his junior and senior high school years in Finland and the U.S. After graduating from the University of Washington (Bachelor of Science, Molecular and Cellular Biology), he worked for Apple Japan Inc. before entering the University of the Ryukyus School of Medicine. He completed his residency at Okinawa Prefectural Chubu Hospital, where he received the Best Resident Award in 2016 and 2017. In 2021, he joined the Department of Cerebrovascular Medicine at the National Cerebral and Cardiovascular Center, specializing in hyperacute stroke.

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People with these symptoms also use Ubie's symptom checker to find possible causes

  • Losing consciousness

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Content updated on Jan 4, 2023

About the symptom

A disorder of consciousness, also known as "impaired consciousness", is when a person's ability to be awake and aware is impaired. After brain injury, a patient may recover consciousness completely or may not recover completely. If the patient does not recover completely and has problems with being awake and aware, this is considered a "disorder of consciousness".

When to see a doctor

Seek professional care if you experience any of the following symptoms

  • Brain not functioning / Brain fog

Possible causes

  • Diabetes mellitus (DM)

    A disease where blood sugar levels are abnormally high, due to problems with insulin production or resistance. There are often no symptoms until the condition has worsened, hence regular screening is important.

  • Cirrhosis of the liver

    A condition where normal liver is permanently damaged and replaced with scar issue. There are many different causes including infections, alcohol abuse and diabetes.

  • Sleep disorder

    Sleep disorders are conditions that affect the quality, timing or duration of your sleep, impacting your ability to function when you are awake. There are many types of sleep disorders, they include disturbances in the quality or quantity of sleep or excessive daytime sleepiness, abnormal behaviors that occur during sleep, sleep disorder related to a mental disorder and many more.

  • Schizophrenia
  • Alzheimer dementia (AD)
  • Common cold (upper respiratory tract infection)

Related serious diseases

Questions your doctor may ask about this symptom

Your doctor may ask these questions to check for this symptom

  • Do you have problems focusing or a reduced sense of awareness in your surroundings?

  • Have you currently regained consciousness after temporarily losing consciousness?

  • Do you have headaches or does your head feel heavy?

  • Do you have a fever?

  • Do you feel any weakness in your arms or legs?

Other Related Symptoms

Similar symptoms or complaints

Reviewed By:

Bret Mobley

Bret Mobley, MD, MS (Neuropathology)

Dr. Mobley graduated from the University of Michigan Medical School, completing a masters degree in neuroscience between his second and third years of medical school. He trained as a resident in pathology at Stanford University Hospital before joining the faculty of Vanderbilt University Medical Center in Nashville Tennessee in 2010. He was promoted to Associate Professor in 2018 and to Neuropathology Division Director in 2020.

Shohei Harase

Shohei Harase, MD (Neurology)

Dr. Harase spent his junior and senior high school years in Finland and the U.S. After graduating from the University of Washington (Bachelor of Science, Molecular and Cellular Biology), he worked for Apple Japan Inc. before entering the University of the Ryukyus School of Medicine. He completed his residency at Okinawa Prefectural Chubu Hospital, where he received the Best Resident Award in 2016 and 2017. In 2021, he joined the Department of Cerebrovascular Medicine at the National Cerebral and Cardiovascular Center, specializing in hyperacute stroke.

From our team of 50+ doctors

Just 3 minutes.
Developed by doctors.

Ubie is supervised by 50+ medical experts worldwide

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