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brain fog
noun
: a usually temporary state of diminished mental capacity marked by inability to concentrate or to think or reason clearly
Examples of brain fog in a Sentence
Recent Examples on the Web
The condition can lead to chronic fatigue, joint and muscle pain, rashes and other skin issues, brain fog, memory problems, and headaches, among a whole slew of other symptoms.
—Korin Miller, SELF, 11 Mar. 2024
Symptoms can last for months or years, and may include fatigue, fever, brain fog, difficulty breathing, cough, chest pain, heart palpitations, digestive issues, joint and muscle pain, headaches, dizziness, sleep disruption, depression, and anxiety.
—Michelle Travis, Forbes, 21 Feb. 2024
Having too much dopamine or norepinephrine is associated with anxiety, insomnia, and aggression, while having too little may lead to brain fog, fatigue, and lack of motivation.
—Caitlin Pagán, Verywell Health, 24 Jan. 2024
This involves sorting out how patients with different symptoms—respiratory illness, brain fog, neuropathies—cluster along multiple axes.
—Rachael Bedard, The New Yorker, 23 Jan. 2024
The complaint also claims that since drinking the lemonades Skerritt has experienced shortness of breath, palpitations, brain fog, difficulty thinking and concentrating, body shakes, and weakness.
—Antonia Debianchi, Peoplemag, 22 Jan. 2024
The issues have persisted, the lawsuit alleges, and Skerritt is now on medication to help control her recurring bouts of rapid heartbeat, shortness of breath, brain fog, body shakes, weakness, and a tremor in one hand.
—USA TODAY, 19 Jan. 2024
All consumers report the product’s incredible potency and surprisingly intense effects, which seem to be especially prominent in people struggling with brain fog.
—Sponsored Content, The Mercury News, 10 Jan. 2024
Lifting the fog on the true causes behind these cognitive impairments, including brain fog, will require years if not decades of concerted efforts by researchers across the globe.
—Ziyad Al-Aly, CBS News, 28 Feb. 2024
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'brain fog.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
First Known Use
1853, in the meaning defined above
Dictionary Entries Near brain fog
Cite this Entry
“Brain fog.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brain%20fog. Accessed 28 Mar. 2024.
Medical Definition
brain fog
noun
: a usually temporary state of diminished mental capacity marked by inability to concentrate or to think or reason clearly
This brain fog can be a result of being overly stressed, tired, carrying extra weight, consuming too many calories or consistently consuming a diet poor in nutrients.—Kylie Helgens, The Gazette (Cedar Rapids, Iowa)
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