Sleep & energy
4 guidesPoor sleep, snoring and waking up tired.
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ChangeWhat is brain fog? Find the cause of yours
Brain fog means trouble concentrating, remembering, finding words or thinking clearly. It describes symptoms, not a single condition. What brain fog is
When is your brain fog worst?
Choose an answer to see related causes and articles.
Prefer questions? Brain fog test, made by a doctor
What causes brain fog?
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Change- Take the quiz Answer up to 13 questions to see which causes to read about first.
- Browse all causesExplore the causes by category.
Metabolic & hormonal
11 guidesBlood sugar, thyroid problems and hormone changes.
Gut & nutrition
14 guidesFood reactions, digestive problems and low nutrient levels.
Mind & mood
5 guidesADHD, autism, depression and other mental health conditions.
Daily life & habits
4 guidesCaffeine, nicotine, diet and physical activity.
Immune & infection
7 guidesInfections, autoimmune conditions and symptoms that continue after an illness.
Circulation & connective tissue
3 guidesPOTS, EDS and fibromyalgia.
Brain & body
6 guidesHead injuries, migraines, neck problems and blood flow to the brain.
Neurological
5 guidesMS, anxiety, trauma and burnout.
Environment & exposures
5 guidesAir quality, mold, chemicals and medication side effects.
Women’s health
2 guidesEndometriosis and pregnancy.
Life changes & recovery
3 guidesRecovery after childbirth, surgery or cancer treatment.
Pain & fatigue
1 guidePersistent pain and its effects on thinking.
Organ systems
2 guidesKidney disease and multiple myeloma.
How to get rid of brain fog
Symptoms that can help explain your brain fog
Do you wake up tired, with a headache or a dry mouth?
Read about sleep apnea if you snore, wake with a dry mouth or headache, or someone has noticed pauses in your breathing.
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Articles
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What does brain fog feel like?
Examples of trouble concentrating, remembering and finding words.
Brain fog after eating
Compare when symptoms start, what you ate and whether you also get bloating, itching or shakiness.
Brain Fog After Normal Tests: Prepare for Your Visit
Bring your test results and examples of what has changed to your next appointment.
Related guides
Already have a test result?
Look up what your test measures and what the result means.
Open the lab interpreter
Research on caffeine withdrawal
- 2004
Which symptoms follow caffeine withdrawal?
Stopping caffeine can cause headache, tiredness, sleepiness, low mood, irritability and trouble concentrating.
- 2018
Why people respond differently
People clear caffeine at different speeds and feel different effects.
New brain fog research
- Menopause, brain aging and cognition
Forgot a basic word mid-meeting? 1,300 blood proteins differ by menopause stage.
Read the analysis ↗ - Hearing, tinnitus and cognition
Your “bad memory” might start with your ears
Read the analysis ↗ - Depression and cognition
Recurrent depression: lower scores in five thinking skills, no clear difference in most comparisons
Read the analysis ↗
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- ArticleWhat does brain fog feel like?
- CauseSleep