# Perimenopause or ADHD? Focus and memory at 40+ · Peri Signals > Source: https://perisignals.com/articles/perimenopause-or-adhd Is it perimenopause? ## Perimenopause or ADHD? Losing focus, forgetting things and feeling overwhelmed for the first time in your 40s fits perimenopause, which the NHS lists as causing problems with memory and concentration. ADHD starts in childhood, so the question that separates the two is whether these struggles have always been there in some form. They can also overlap: women with ADHD report heavier perimenopause symptoms, and some first notice their ADHD when the old coping systems stop working. By Nora Whitfield, 3 November 2026 ### Where the two look alike Put the lists side by side and the overlap is obvious. The [NHS page on ADHD in adults](https://www.nhs.uk/conditions/adhd-adults/) describes inattentive ADHD as being easily distracted or forgetful, finding it hard to organise your time, struggling to follow instructions or finish tasks, and losing things like keys and phones. The [NHS perimenopause symptom page](https://www.nhs.uk/conditions/menopause-and-perimenopause/symptoms/) lists problems with memory and concentration, along with poor sleep, anxiety and mood changes, all of which make it harder to hold a thought. So a woman of 44 who keeps missing deadlines, leaves the oven on and cannot get through her inbox could be describing either one. Restlessness, irritability and snapping at people can come from both as well. What the symptoms feel like on a given Tuesday will not settle it. ### The question that separates them: when did it start? ADHD is a lifelong condition. The NHS says its symptoms usually start before the age of 12, and an adult assessment is built around that. A specialist asks about your symptoms as a child, how they affected you at school, and may want to talk to a family member or close friend who knew you then. Perimenopause has a start date of its own. It usually begins in your mid-40s, and the first sign is most often a change in your periods: closer together or further apart, heavier or lighter. Our guide to [when perimenopause starts and how long it lasts](/articles/when-does-perimenopause-start) has the age ranges. The catch is that ADHD in women is easy to miss in childhood. The NHS notes it is recognised less often in women than in men, possibly because women more often have the inattentive type, which is quieter than the hyperactive type. A girl who daydreamed, lost her homework and scraped through on last-minute effort may never have been assessed. Looking back honestly, with a parent or an old school report if you have one, is the most useful thing you can do before an appointment. ### Why ADHD symptoms can get worse in perimenopause If you already have ADHD, or suspect you always did, perimenopause may make it harder to manage. In a [population study of 5,392 Icelandic women aged 35 to 55](https://europepmc.org/articles/PMC12538516), published in European Psychiatry in 2025, 54% of the women with ADHD reported severe perimenopausal symptoms, against 30% of those without it. They scored higher on mood, physical and urogenital symptoms alike, and the gap was widest at 35 to 39, which the authors read as perimenopause starting earlier in women with ADHD. An earlier [Dutch study of 209 women with ADHD](https://doi.org/10.1016/j.jpsychires.2020.12.005) found high rates of PMDD, depression after a first birth and menopausal symptoms, which suggests a sensitivity to hormone changes across life. If your worst weeks line up with your cycle, our page on [PMDD or perimenopause](/articles/pmdd) explains how to tell a premenstrual pattern from a month-long one. Both studies have limits. The Icelandic one took a single snapshot and relied on women saying whether they had been diagnosed, so it shows the two travel together without proving one causes the other. It also found that about 8% of women without a diagnosis, aged 35 to 44, reported severe ADHD symptoms that eased in older age groups, and the researchers could not say whether those symptoms had started in childhood. That group is exactly the reader of this page, and the honest answer for them is that nobody yet knows how many have lifelong ADHD and how many are going through a midlife change that looks like it. ### Clues that lean one way No single clue decides it, and a doctor will weigh them together. These are the ones I would think through before an appointment. Signs that point towards perimenopause: * the focus and memory problems are new, and you managed well enough until a year or two ago * your periods have changed, or you have hot flashes, night sweats or broken sleep at the same time * bad weeks come and go, often after bad nights * you are in your 40s, or your late 30s with other perimenopause signs Signs that point towards ADHD, with or without perimenopause on top: * teachers, partners or parents described you as disorganised, dreamy or always late long before your 40s * you built lists, alarms and routines years ago to keep up, and they are now failing * the struggle has been steady through your adult life, with better and worse spells * a parent, sibling or child has an ADHD diagnosis, since the NHS says it often runs in families If you tick items on both lists, both may be true. Many women diagnosed in midlife describe exactly that mix: a lifelong pattern they had learned to cope with, made unmanageable when perimenopause arrived. ### Brain fog or ADHD: rule out the other causes too Forgetfulness in your 40s has more than two possible explanations, and several can be found with a blood test. Iron deficiency from heavy periods, low vitamin B12 or folate, and an underactive thyroid all cause tiredness and slowed thinking. Our guide to [brain fog in perimenopause](/articles/brain-fog-perimenopause) covers these and the signs that need a prompt memory check, and [perimenopause or thyroid](/articles/perimenopause-or-thyroid) sets out which symptoms point to the thyroid. Depression and anxiety matter here as well. The NHS ADHD page says they can make ADHD symptoms worse, and they can cause poor concentration on their own. If low mood has settled in for weeks, raise it at the same appointment. ### How to raise it with your doctor Start with the GP or family doctor. The NHS says a GP will ask about your symptoms and how they affect your life, consider other conditions that could explain them, and may refer you to an ADHD specialist. Waits for an adult ADHD assessment can run to months or years, so asking early is reasonable even while perimenopause is being looked at. For women over 45, the [NICE menopause guideline](https://www.nice.org.uk/guidance/ng23) says perimenopause is identified from symptoms and cycle changes without hormone tests, which puts weight on what you can describe. Two or three months of notes give the doctor something firmer than "I can't think straight". Write down: * what you forgot or could not finish, and on which days * how you slept, and whether night sweats woke you * the first day of each period and how heavy it was * mood, stress and any medicines or supplements * examples from childhood and school, and who could speak to them A notebook works, and our [printable symptom diary and appointment checklist](/articles/printable-perimenopause-symptom-diary-and-appointment-checklist) has rows for memory, sleep and bleeding. If your phone is easier to keep up with, [Her Good Days](https://hergooddays.com/#get) is a free app that lets you log brain fog as mild, moderate or severe with the time, next to your period dates, sleep and medication, and turns a date range into a PDF report for the appointment. It records what you report and offers no reading of it, which is what you want when the question is still open. It is due on the App Store and Google Play soon, with no paid plan. Lining up the days matters for this question. Fog that clusters around bad nights or the week before a period leans towards hormones, while trouble that runs through good weeks and bad ones looks more like a steady trait. ### My take I'd start with the calendar and judge it by one test: did any of this exist before you turned 40? If the problems are new, your cycle has started to shift and your worst days follow your worst nights, I would treat it as perimenopause first and keep notes for a couple of months. If you recognise yourself in the second list, with a history of lost homework, late arrivals and elaborate systems going back decades, I would ask for an ADHD referral now rather than waiting to see whether perimenopause explains everything, because the queue is long and the two can be true at once. In both cases I'd ask for the blood tests that rule out anaemia, low B12 and thyroid problems, which take one sample. ### Related reading This page sits with our other look-alike guides in [Is it perimenopause?](/topics/is-it-perimenopause). If you are still unsure what stage you are in, the [perimenopause symptom checklist](/articles/could-it-be-perimenopause-a-symptom-checklist-with-what-to-do-next) sorts your answers and says what to do next, and [perimenopause symptoms and how to track them](/articles/perimenopause-symptoms) covers the full list. Written by Last checked 2026-11-03 --- [Peri Signals](/) Perimenopause symptoms, explained and tracked Plain answers on perimenopause symptoms for women 35 to 65: what is common, what to tell your doctor, and how to keep a useful symptom record. Some links on this page may earn us a commission. It never decides what we write about or recommend. © 2026 Peri Signals. Independent and reader-supported.