Brain Fog
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Losing consciousness
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Content updated on Sep 6, 2022
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
- Heatstroke
This is a life threatening emergency where the person's body temperature is dangerously elevated and they display neurologic abnormalities. This occurs when the body fails to regulate its temperature properly. It can be caused by the surrounding environment (heat, moisture) or internal factors (dehydration, strenuous exercise).
- Tuberculosis (TB) (including scrofuloderma)
- Right heart failure
- Hypoglycemia
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
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Developed by doctors.
Ubie is supervised by 50+ medical experts worldwide
Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan