Long COVID fatigue is a disabling exhaustion that lasts at least 3 months after COVID-19, is not relieved by rest and often crashes after effort (post-exertional malaise). Covers causes, testing, pacing, treatments and how long it lasts.
Menopause brain fog eases for most women within one to three years after menopause, and sleep, exercise, and early transdermal HRT show the strongest evidence for relief.
To get rid of brain fog, find and treat its cause first, such as sleep apnea, thyroid disease, low B12, iron or vitamin D, blood sugar swings or medication side effects. Then sleep, exercise and diet carry the strongest evidence, ahead of supplements and advanced therapies.
Brain fog after COVID affects about 22% of people 12 or more weeks after infection, according to a 2022 meta-analysis. Most improve within 3 to 12 months, and treatment targets drivers such as poor sleep, overexertion and mast cell activation.
Fibro fog is a measurable drop in working memory, attention and processing speed that affects an estimated 50 to 80 percent of people with fibromyalgia. Pain signaling, poor sleep, neuroinflammation and reduced brain blood flow drive it, and treating them together helps most.
Brain fog is a symptom, not a diagnosis: slowed thinking, poor focus and memory lapses that usually trace back to a testable cause such as thyroid disease, nutrient deficiency, sleep apnea, menopause, medications or Long COVID.
