Brain Fog, ADHD and Perimenopause
Walking into a room and forgetting why you're there. Losing your train of thought mid-sentence. Reading the same paragraph three times. Feeling overwhelmed by things you once managed without thinking.
I hear this in clinic almost every week. When poor concentration, forgetfulness or brain fog becomes more frequent, it's worth asking why, rather than accepting that feeling mentally overwhelmed is simply part of getting older or having a busy life.
Is there too much on your plate? Are you sleeping poorly? Could hormones or nutritional deficiencies be involved? Or could ADHD be part of the picture? Often, there's more than one factor at play, and understanding them helps you work out where to start.
What Might Be Getting in the Way?
Brain fog isn't a diagnosis. It's a term for difficulties with concentration, memory, mental clarity and processing information. Common contributors include:
Sleep: poor or insufficient sleep affects attention, memory, mood and mental performance.
Stress: ongoing stress and mental overload make it harder to concentrate, organise your thoughts and follow through.
Nutrition: under-eating, an unbalanced diet or certain nutrient deficiencies can contribute to fatigue and poor concentration.
Hormones: fluctuations during perimenopause and menopause can influence sleep, mood and cognition.
Underlying health conditions: thyroid disorders and other conditions can affect energy, concentration and clarity.
ADHD: longstanding difficulties with attention, organisation, time management and working memory may be related to ADHD, even if it was never recognised.
Women, ADHD and Perimenopause
ADHD doesn't suddenly develop at menopause. It's a neurodevelopmental condition, so the underlying pattern begins in childhood, even when it isn't diagnosed until adulthood. In women, it often looks different from the hyperactivity most people picture:
Distractibility and difficulty maintaining focus
Procrastination and trouble getting started
Forgetfulness and losing track of everyday tasks
Difficulty finishing things
Poor time management
Feeling easily overwhelmed by competing demands
Many women build strategies to cope. They become highly organised, lean on routines or simply work harder to compensate for challenges others don't see. Sometimes this works well for years. Then something changes.
Could Perimenopause Make a Difference?
Yes. Oestrogen plays an important role in brain function and interacts with dopamine, which is involved in motivation, attention and executive function. As oestrogen fluctuates and eventually declines, some women notice changes in concentration, word-finding, memory and emotional regulation.
For women with ADHD, these changes can make existing difficulties more noticeable. Strategies that once worked may stop working, especially alongside disrupted sleep, increased stress and other midlife changes.
That doesn't mean every woman with perimenopausal brain fog has ADHD. But it does mean that when strategies that have worked for years suddenly stop working, it's worth asking what else has changed.
ADHD, Perimenopause or Both?
The symptoms overlap considerably, so timing and history matter.
Pointing towards ADHD: patterns dating back to childhood or adolescence, longstanding organisation or time-management difficulties, chronic procrastination or trouble getting started, and distractibility across different stages of life.
Pointing towards perimenopause: symptoms that are newly appearing during the menopausal transition, such as changes in menstrual cycles, hot flushes or night sweats, and new word-finding or cognitive changes.
Common to both: poor concentration, forgetfulness, feeling overwhelmed and emotional changes.
New cognitive symptoms in midlife shouldn't automatically be labelled ADHD, and longstanding difficulties shouldn't automatically be dismissed as menopause. A proper assessment looks at the full picture, including symptom history, hormones, sleep, stress and general health.
Supporting a Clearer, More Focused Brain
These habits won't replace assessment or treatment for ADHD or other medical conditions, but they're a useful place to start.
1. Prioritise sleep. Keep a consistent sleep and wake rhythm where you can. If you're regularly waking at night or struggling to fall asleep, it's worth investigating why.
2. Eat regularly. Build meals around quality protein, colourful plants, healthy fats and fibre-rich whole foods. Avoid consistently under-eating or relying on caffeine and quick snacks to get through the afternoon.
3. Move your body. Walking, swimming, dancing, yoga and cycling all count. Regular activity is associated with benefits for mood and cognitive function, so choose something you enjoy and can realistically keep up.
4. Get outside early. Morning light helps reinforce your body clock and your natural sleep and wake rhythm. Even a short walk or a few minutes in the garden helps.
5. Reduce the mental load. Your brain doesn't need to remember everything. Use calendars, reminders, lists and simple routines, break big tasks into smaller steps, and cut unnecessary distractions.
When Is It Worth Looking Deeper?
If changes in concentration, memory or clarity are persistent, noticeably different from your usual self or affecting daily life, it's worth investigating rather than assuming it's stress, ageing or menopause. Depending on your history, that may include looking at:
Nutritional intake and possible deficiencies
Thyroid function and general health
Sleep quality and possible sleep disorders
Hormonal changes of perimenopause and menopause
Ongoing stress and lifestyle factors
Longstanding patterns that may suggest ADHD
If ADHD is suspected, a formal assessment should be carried out by an appropriately qualified medical or mental health professional.
My role is to work alongside your medical team and look at the broader picture, including nutrition, pathology, hormones, sleep, stress, lifestyle and health history, to help identify what may be contributing and develop practical strategies for your individual needs.
Coming Back to the Foundations
Feeling mentally overloaded, forgetful or unable to concentrate can be frustrating, especially when you no longer feel like yourself. But brain fog has causes, and those causes can be explored. Start with the foundations of sleep, regular nourishing meals, movement, daylight and a lighter mental load, and if things still don't feel right, look deeper with the right support.