PCW Clarity · Brain fog, mood and anxiety
Is my brain fog perimenopause, and will it go away?
You walk into a room and forget why. A word you've used for 30 years won't come. It's scary.
The short answer
For many women, yes, it's linked to the menopause transition, and the research suggests it's often a phase, not a sign of dementia. SWAN followed 2,362 midlife women for 4 years. Normally, scores on memory and processing-speed tests improve with practice. In late perimenopause, processing-speed scores didn't improve, and verbal memory didn't climb during perimenopause. After menopause, learning bounced back to premenopausal levels, which the researchers said suggests these difficulties may be time-limited (Greendale 2009). Brain imaging research also shows the brain changes how it's built and how it uses energy around menopause (Mosconi 2021).
Mood is part of the same picture. In a SWAN study, women were 2 to 4 times more likely to have an episode of major depression when they were perimenopausal or early postmenopausal than before the transition, even after accounting for past depression (Bromberger 2011). Anxiety can rise too (Bromberger 2013). Fast or worsening memory loss is different, and it deserves a prompt check.
Why does this matter?
- You're not losing your mind. Naming the cause lowers the fear, and fear makes focus worse.
- Sleep and hot flashes feed the fog. Poor sleep and night sweats travel with memory slips. See sleep in perimenopause.
- Mood changes are real and treatable. There are guidelines for evaluating and treating perimenopausal depression (Maki 2018).
- Other causes need ruling out. Thyroid problems, low iron or B12, medications and depression can all cloud thinking. Your clinician decides what to check.
- Brain health is a long game. Heart health, blood sugar, sleep and movement all matter for the brain. Hormone therapy is not recommended just to prevent dementia (NAMS 2022).
How do I sort out what's behind my brain fog?
- Write down examples. What happened, when, and how often. Lost words, missed appointments, rereading the same page.
- Line it up with your cycle and sleep. Does it get worse after bad nights or around irregular periods?
- Check your mood honestly. Sadness, worry or irritability most days for 2 weeks or more is worth naming. If you have thoughts of self-harm, call or text 988 now.
- List everything you take. Some medicines, alcohol and sleep aids affect memory.
- Ask about basic labs. Thyroid, blood count, iron or B12 are common questions. See midlife bloodwork.
- Know the red flags. Fast or worsening memory loss, getting lost in familiar places, or trouble with everyday tasks need a prompt medical check.
Who on my care team handles what?
- Your clinician rules out other causes, screens mood and reviews menopause-related options.
- A mental health therapist helps with anxiety, low mood and the identity changes that come with this season.
- A sleep specialist when snoring or poor sleep may be part of it.
- A pharmacist checks medications that can dull memory.
Where it breaks: the therapist treats the anxiety, the clinician checks the thyroid, and nobody connects either one to the night sweats. A shared summary of symptoms, sleep and mood helps each pro see the whole picture.
How does the DAITT® Method connect to this?
DAITT® (say it like “date”) is our five-part way to look at a whole life. In wellness, the letters stand for Discipline of the body, Awareness, Intellect, Trust and Treasury. Here's how each one touches this question:
- Discipline of the body: Move most days. Exercise and sleep are two of the steadiest brain supports we have.
- Awareness: Name the emotion under the fog: fear, grief, overload.
- Intellect: Keep learning on purpose: a new skill, a book club, a class. Then give yourself grace on the bad days.
- Trust: Lean on purpose and faith practices that steady you, in whatever form is yours.
- Treasury: Brain fog and money mistakes travel together. Slow down big money decisions; drpatclarity.com covers that side.
Have you made a DAITT® with your future self? Take the free wellness DAITT® quiz on drpat.co. No forms, and nothing is saved.
How could a symptom log help?
Illustration
An illustration, not a client story. Jen is 47, a project manager. She's lost words in two meetings this month and missed a deadline she has never missed. Her mother had dementia, and she's terrified.
Her log shows the worst days follow nights with 3 or more wake-ups, and her periods have been 2 to 7 weeks apart. She also notes she's felt flat and teary most days for a month. She brings it all to her clinician, who screens her mood, checks the labs that fit her, and talks about where she is in the transition. Jen also asks what signs would mean she should come back sooner. She leaves with a plan and less fear.
What do the experts say, and where does the evidence land?
Dr. Mary Claire Haver (on Huberman Lab) and neuroscientist Dr. Lisa Mosconi (in The Menopause Brain and on The Peter Attia Drive) both describe brain fog as a real, often temporary part of the transition. Dr. Mosconi's research suggests the timing of hormone therapy may matter for the brain, but that research is still early. The Menopause Society's 2022 statement does not recommend hormone therapy to prevent dementia, and we go with that guidance.
Related questions
Does perimenopause cause brain fog?
Research links the two. In SWAN, women's usual improvement on memory and processing-speed tests stalled during perimenopause and bounced back after menopause (Greendale 2009). Your clinician should still rule out other causes.
Does menopause brain fog go away?
For many women it appears to be time-limited. SWAN found learning returned to premenopausal levels after menopause (Greendale 2009). Fast or worsening memory loss is different and needs a prompt check.
Can perimenopause cause depression or anxiety?
Yes, the risk rises. Women in SWAN were 2 to 4 times more likely to have major depression during perimenopause or early postmenopause (Bromberger 2011), and anxiety can rise too (Bromberger 2013). If you have thoughts of self-harm, call or text 988.
Sources
Peer-reviewed research
- Greendale GA et al. (2009). Effects of the menopause transition and hormone use on cognitive performance in midlife women. Neurology, 72:1850-7.
- Mosconi L et al. (2021). Menopause impacts human brain structure, connectivity, energy metabolism, and amyloid-beta deposition. Sci Rep, 11:10867.
- Bromberger JT et al. (2011). Major depression during and after the menopausal transition: Study of Women's Health Across the Nation (SWAN). Psychol Med, 41:1879-88.
- Bromberger JT et al. (2013). Does risk for anxiety increase during the menopausal transition? Study of women's health across the nation. Menopause, 20:488-95.
Medical societies and government
- Maki PM et al. (2018). Guidelines for the evaluation and treatment of perimenopausal depression: summary and recommendations. Menopause, 25:1069-1085.
- The North American Menopause Society (now The Menopause Society) (2022). The 2022 hormone therapy position statement of The North American Menopause Society. Menopause, 29:767-794.
- 988 Suicide & Crisis Lifeline. Call or text 988.
Expert voices (commentary, not research)
- Dr. Mary Claire Haver (OB/GYN). The New Menopause (book, Rodale, 2024).
- Dr. Mary Claire Haver on Huberman Lab. How to Navigate Menopause & Perimenopause for Maximum Health & Vitality (podcast episode, June 2024).
- Dr. Lisa Mosconi on The Peter Attia Drive. #381 Alzheimer's disease in women: how hormonal transitions impact the female brain (podcast episode, Jan 2026).
- Dr. Lisa Mosconi (neuroscientist). The Menopause Brain (book, Avery, 2024).
What's a good next step?
Start by learning, not buying. Read the short summary of this topic in the Women's Metabolic Clarity library at Pinnacle Coordinated Wellness, take the wellness DAITT® quiz, and bring the questions above to your clinician. If you'd like to see how a coordinated, done-with-you care team works, visit pinnaclecoordinatedwellness.com.
Read the library summaryTake the wellness DAITT® quiz
Questions to ask a licensed clinician
- Could my brain fog be linked to menopause?
- Should we check my thyroid, blood count, iron or B12?
- Could my mood be part of this? Can you screen me for depression and anxiety?
- Could any medicine I take affect my memory?
- What signs would mean I should come back sooner?
- What helps my sleep, since sleep affects memory?
Bring these, a short symptom log and your medication list to your next visit.
Who is Dr. Pat Pachciarz®?
Dr. Pat Pachciarz® is the founder of Pinnacle Coordinated Wellness and Founder & CEO of The Pinnacle Group in Aurora, Illinois. He is a Certified Personal Trainer and Certified Nutrition Coach through the National Academy of Sports Medicine. He's the guide and educator here, not a clinician: he teaches how to think about coordination and what to ask your licensed clinicians. More about Dr. Pat Pachciarz®.
More answers
- Why can't I sleep through the night in perimenopause?
- Why do I feel so guilty when I can't keep up with my workouts?
- What bloodwork should I ask for in perimenopause and menopause?
- Is menopause hormone therapy safe? What changed in 2025?
- Why am I gaining weight in perimenopause when nothing else changed?
- How much protein do I need to keep muscle after 40?
- Why is my blood sugar creeping up after menopause?
- Is cortisol causing my belly fat in menopause?
- Should I lift weights or do cardio after 40?
Related for women in life transition
Big money decisions often land during the foggiest seasons. If you're facing a loss, an inheritance or a divorce, these answers take them one step at a time:
- Widowhood: money decisions in the first year after losing a spouse
- Inheritance taxes: do I owe money on what I got left?
- Divorce financial planning: the money questions women ask first
- Take the wellness DAITT® quiz on drpat.co
Also see Pinnacle Coordinated Wellness, drpat.co for the wealth and wellness crossover, and drpatclarity.com for family money questions.