Mental Fogginess
A pervasive sense of mental cloudiness, reduced clarity, and cognitive sluggishness that impairs concentration, memory, and processing speed.
Quick answer
Mental fogginess (cognitive fog) is a subjective state of reduced mental clarity, difficulty concentrating, and slowed processing — broadly synonymous with brain fog. ICD-10: R41.3; ICD-11: MB21.3. A hallmark symptom of ME/CFS, long COVID, fibromyalgia, hypothyroidism, and numerous other conditions affecting central neurological function.
Recognition
Do any of these feel familiar?
People often report feeling like they're in a haze, struggling to concentrate or remember details.
What is Mental Fogginess?
A pervasive sense of mental cloudiness, reduced clarity, and cognitive sluggishness that impairs concentration, memory, and processing speed.
Approaches Commonly Explored
Commonly explored for conditions related to Mental Fogginess, grouped by mechanism — select your subtype above to highlight the most relevant path.
How to use these approaches
Most people begin with Stabilise approaches, then progress toward Resolve and Sustain.
Nervous system regulation, brain function, and neural pathways.
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Self-care
What You Can Do Now
Self-directed strategies that may support Mental Fogginess alongside professional care.
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