Educational information, not medical advice: see our Medical Disclaimer. Statistics are linked to their sources below.
Key Takeaways
- Perimenopause symptoms usually begin in your mid-40s, though onset varies widely, and changes to your periods are among the most common.
- Hot flashes and night sweats are the most commonly reported symptoms — up to 80% of women have them at some point during the transition (The Menopause Society).
- You won’t necessarily get every symptom, and each woman’s experience is different.
- Symptoms can show up earlier for some women: in a 2025 survey of 4,400+ U.S. women, over half of those aged 30 to 40 reported moderate or severe symptoms, though self-reports can’t confirm perimenopause.
- Many symptoms can also come from other conditions, such as thyroid problems, so it’s worth getting checked rather than guessing. For other signs of a hormone imbalance, see our guide to hormonal imbalance symptoms in women.
- Very heavy bleeding, bleeding after sex, or any bleeding after 12 months without a period should be checked promptly.
Perimenopause symptoms usually start in your 40s and can include irregular periods, hot flashes and night sweats, poor sleep, mood changes, vaginal dryness and brain fog. Not everyone gets all of them, and how strongly you feel each one varies a great deal. This checklist groups the most common ones so you can spot your own patterns — and know which are worth taking to a doctor. For the full picture — stages, symptoms and treatment — see our complete perimenopause & menopause guide.
How to Use This Checklist
Tick the symptoms you’ve noticed over the last few months. There’s no score, and no checklist can diagnose perimenopause on its own, but a written record makes an appointment far more productive — especially if you also note the dates of your periods. Prefer paper? Download our free printable symptom and cycle tracker (PDF).
That record matters more than you might expect. For women aged 45 or over with menopause-type symptoms, NICE guidance says perimenopause can be identified without blood tests when hot flashes or night sweats have recently started alongside any change in the menstrual cycle, because hormone levels such as FSH fluctuate too much for a test to help. NICE says FSH may be considered for women aged 40 to 45 who have symptoms and a change in their cycle.
Still working out which stage you’re in? See our guide to perimenopause vs menopause.
The Perimenopause Symptoms Checklist
Changes to your periods
Changes to your periods are among the most common signs. In the staging system clinicians use, STRAW+10, early perimenopause is marked by cycle length that keeps varying by 7 days or more from one cycle to the next, and late perimenopause by stretches of 60 days or more without a period. Our guide to how long perimenopause lasts explains the stages. For what counts as normal and what to get checked, see our guide to irregular periods in perimenopause. For periods that come about every two weeks, see our guide to period every 2 weeks in perimenopause.
- Cycles that are shorter or longer than your usual
- Skipped periods
- Heavier or lighter bleeding than before
- More or fewer days of bleeding
- Spotting between periods (see the warning signs below)
Hot flashes and night sweats
These are the most commonly reported symptoms of the menopause transition. The Menopause Society says up to 80% of women have them at some point during it. For what helps, see our guide to how to stop hot flashes.
- Sudden waves of heat in your face, neck or chest
- Sweating or flushing, sometimes followed by chills
- Waking up drenched at night
Sleep problems
Sleep problems are a common part of the transition. Night sweats can wake you, but sleep can also change on its own as hormones fluctuate. If tiredness is your main problem, see our guide to causes of constant fatigue in women.
- Trouble falling asleep
- Waking in the early hours and struggling to get back to sleep
- Feeling unrefreshed after a full night
- Fatigue that doesn’t improve with rest
Mood and emotional changes
In the large SWAN study, women were more likely to report high levels of depressive symptoms during the menopause transition than before it. The Menopause Society notes that mood symptoms may be related to big swings in estrogen during perimenopause, although the exact mechanism isn’t known, and that stressful circumstances and other menopause symptoms can contribute. If anxiety is a big part of it, our guide to perimenopause anxiety covers what the research shows and what can help.
- Irritability or mood swings
- Feeling anxious or on edge
- Low mood, or losing interest in things you usually enjoy
- Feeling overwhelmed by things you used to handle easily
If low mood is persistent, or you have thoughts of harming yourself, get help now: contact your doctor, call your local emergency number, or in the US call or text 988.
Brain fog and memory
Foggy thinking and memory lapses are common. In SWAN, women in perimenopause didn’t show the small learning gains on memory tests that they had shown earlier, and performance rebounded after menopause — which suggests these difficulties are usually temporary.
- Losing words or names mid-sentence
- Trouble concentrating
- Walking into a room and forgetting why
If memory problems are severe, getting worse, or affecting daily life, see a doctor.
Vaginal, sexual and urinary changes
Unlike hot flashes, which tend to ease over time, vaginal and urinary symptoms often get worse without treatment, according to The Menopause Society — so it’s worth mentioning them rather than waiting them out. Effective treatments exist.
- Vaginal dryness, itching or irritation
- Discomfort or pain during sex
- A lower sex drive
- Needing to urinate more urgently or often, or getting more urinary tract infections
Body changes
The NHS and The Menopause Society also list changes such as weight gain or changes in where weight sits, joint and muscle aches, headaches, and thinning hair or skin changes.
- Weight gain, or weight settling in different places
- Aching joints or muscles
- New or worsening headaches or migraines
- Thinner hair, or changes to your skin
Which Symptoms Show Up at Which Ages?
Mood and psychological symptoms peaked at younger ages than hot flashes in a 2025 survey of more than 4,400 U.S. women (Flo app users and survey respondents). The survey used the Menopause Rating Scale, a standard symptom questionnaire. Psychological symptoms such as anxiety, depression and irritability peaked at ages 41 to 45. Hot flashes and sweating peaked at ages 51 to 55. Sexual, bladder and vaginal-dryness symptoms were most common after 51 (UVA Health study summary; full paper: npj Women’s Health).
A caution on reading this data: it comes from self-reported surveys and app users, so it may not represent all U.S. women, and moderate or severe symptom scores don’t prove that someone is perimenopausal. It does show that few younger women had discussed symptoms with a clinician: consultation rose from 4.3% at ages 30 to 35 to 51.5% at 56 and older.
It’s Not Only Hot Flashes
Hot flashes are the best-known symptom, but they aren’t always the most frequent one in every group. In a study of 978 women published in BJPsych Open, the five most common symptoms were fatigue (96%), memory problems (93%), concentration difficulties (91%), irritability (90%) and tension or nervousness (90%). Night sweats ranked 14th and hot flushes (the study’s term) 18th (Reisel et al., BJPsych Open, 2024).
Read these numbers with care. The women in this study were already engaged with menopause care and were treated with hormone therapy afterward. The study also didn’t separate perimenopausal from menopausal women. The percentages therefore likely overstate how common these symptoms are in the general population. The useful takeaway is the ranking: fatigue, memory and mood symptoms deserve a place on your radar alongside hot flashes.
When to See a Doctor
Many perimenopause symptoms are manageable, but some signs shouldn’t be put down to “just perimenopause.” Talk to a doctor soon if:
- You’re soaking through one or more pads or tampons every hour. ACOG lists this as abnormal bleeding, and Mayo Clinic advises calling your doctor right away.
- You’re changing pads or tampons every hour for more than 2 hours in a row and you have chest pain, shortness of breath, or feel lightheaded or dizzy. ACOG says to seek emergency medical care right away.
- Your bleeding lasts more than 7 days, or you bleed or spot after sex or between periods. Irregular periods are common in perimenopause, but ACOG lists these as abnormal uterine bleeding worth raising with a doctor.
- Your cycles are shorter than 21 days or longer than 35 days, or you go 3 to 6 months without a period. These are ACOG’s general abnormal-bleeding definitions, not perimenopause-specific cutoffs.
- You’ve gone 12 months without a period and then have any vaginal bleeding.
- You notice heart palpitations. As a precaution, we suggest emergency care if they come with chest pain, fainting or shortness of breath.
- Symptoms are disrupting your sleep, work or relationships — you don’t have to simply put up with them.
- You’re under 40 and have menopause-like symptoms or your periods stop, which can be a sign of premature ovarian insufficiency.
What Else Can Look Like Perimenopause
Several conditions cause overlapping symptoms, which is one reason a checklist isn’t enough on its own:
- Thyroid problems. An underactive thyroid can cause weight gain, fatigue, mood changes, forgetfulness and irregular periods; an overactive one can cause hot flashes, heart palpitations, anxiety and trouble sleeping (Mayo Clinic Press).
- Heavy bleeding and anemia. Uterine fibroids can cause heavy, longer and more frequent periods, and the blood loss can lead to anemia.
- Pregnancy. Irregular periods don’t rule it out — ovulation can still happen during perimenopause.
- Depression or an anxiety disorder. Mood symptoms can be part of perimenopause, but they can also stand alone, and they’re worth treating either way.
A doctor can check for many of these with simple tests — for example, a blood test can show whether you have a thyroid condition.
What to Do Next
- Keep a symptom and period diary for a few months. Our printable tracker (PDF) makes this easier.
- Book a visit with a doctor or other clinician who understands the menopause transition, as Mayo Clinic advises.
- Bring your notes, your questions, and a list of any medicines and supplements you take.
- Ask about your options. Our guide to perimenopause treatment options compares hormone therapy, nonhormone medicines and more; the right choice depends on which symptoms bother you most and on your health history.
Frequently Asked Questions
What are the first signs of perimenopause?
Changes to your periods are among the most common early signs — for example cycles that vary in length by 7 days or more from one to the next — often alongside hot flashes, sleep changes or mood shifts. The order varies from woman to woman.
How early can perimenopause symptoms start?
It usually begins in the mid-40s, but onset varies widely (The Menopause Society), and hormone changes can begin in the 30s (ACOG). If your periods stop or you have menopause-like symptoms before 40, see a doctor.
How long do perimenopause symptoms last?
The Menopause Society estimates women remain in perimenopause for roughly 4 to 8 years, and some symptoms can continue after periods stop: in SWAN, hot flashes and night sweats lasted a median of 7.4 years in total. See our guide to how long perimenopause lasts.
Can perimenopause cause anxiety or depression?
Mood symptoms are common. In SWAN, major depressive episodes were most common during perimenopause and just after menopause compared with late premenopause. If your mood is affecting daily life, see a doctor — it can be treated whatever the cause.
How do I know if it’s perimenopause or something else?
You can’t tell from symptoms alone, because thyroid problems, anemia and other conditions overlap. A doctor can review your symptoms and period history and run simple tests to rule out other causes.
Sources: Symptoms — The Menopause Society · Perimenopause — The Menopause Society · Symptoms of menopause and perimenopause — NHS · Perimenopause: symptoms and causes — Mayo Clinic · Menopause symptoms? It could be a copycat — Mayo Clinic Press · Menopause: identification and management (NG23) — NICE · Perimenopausal bleeding — ACOG · The Menopause Years — ACOG · STRAW+10 staging — ASRM · Depressive symptoms during the menopausal transition — SWAN · Major depression during and after the menopausal transition — SWAN · Cognitive performance in midlife women — SWAN · Duration of vasomotor symptoms — SWAN · Perimenopause symptoms, severity and healthcare seeking — UVA Health / npj Women’s Health · Cognitive and mood symptoms in perimenopausal and menopausal women — BJPsych Open
About the author
Jessica Bordo writes Daily Health Cycle, sharing practical, trustworthy, and easy-to-understand content to help women feel more confident in their bodies, make informed choices, and build healthier everyday habits. More about Jessica
This article is for educational purposes only and isn’t a substitute for professional medical advice, diagnosis, or treatment. Read our medical disclaimer.
