Perimenopause Symptoms: A Complete Guide to What’s Normal

Perimenopause is the transition before menopause, when your ovaries’ hormone production becomes irregular. It usually starts in your 40s, and the most common symptoms are changes to your periods, hot flashes and night sweats, poor sleep, mood changes, brain fog, vaginal dryness and joint aches. Symptoms can begin several years before your last period and often ease after menopause, and there are effective treatments if they’re affecting your life.

What is perimenopause?

Perimenopause means “around menopause”. It’s the time before your periods stop for good, when your ovaries produce estrogen and progesterone in an increasingly erratic way and you ovulate less often. Those hormone swings, rather than simply low hormones, are behind many of the symptoms.

Menopause is a single point in time: the day that marks 12 months since your last period. After that, you’re postmenopausal.

How long does it last and when does it start?

• Average age of menopause: about 51 to 52 (about 51 in the UK, according to the NHS). Most women reach menopause between 45 and 55.
• When symptoms start: Ireland’s health service (HSE) says symptoms can begin 7 to 10 years before your periods stop, which means many women notice changes in their early to mid-40s.
• Earlier than expected: if your periods stop or symptoms start before 45, and especially before 40, see a doctor. Early menopause has its own health considerations and is worth checking.

Common perimenopause symptoms

Not everyone gets every symptom, and some women barely notice the transition. Here are the most common signs, grouped by type.

Period changes

Changing periods are usually the first sign. The Menopause Society describes a typical pattern:

• Early on: cycles often become a little shorter, and bleeding may be heavier or lighter.
• Later: cycle length starts to vary by 7 days or more, and you may skip periods for 60 days or longer.

Any change in bleeding is worth tracking, and some changes need checking by a doctor (see below).

Hot flashes and night sweats

Hot flashes are a sudden, intense feeling of heat in the face, neck and chest, often with sweating, chills, anxiety or a racing heart. They typically last 1 to 5 minutes. Night sweats are hot flashes that happen while you sleep. According to The Menopause Society, up to 80% of women have them at some point during the menopause transition.

Sleep problems

Trouble falling asleep, waking in the night (often with night sweats) and waking too early are all common. Poor sleep then makes mood, concentration and energy worse, so treating sleep problems can improve several symptoms at once. Our guide to mindfulness for better sleep has simple techniques to try.

Mood changes, anxiety and low mood

Many women notice irritability, mood swings, anxiety, low mood or lower self-esteem. The large hormone swings of perimenopause may play a role, and women who have had depression before are at higher risk of it returning. These feelings are common, real and treatable.

Brain fog

Forgetfulness, losing your train of thought and trouble concentrating are common. The Menopause Society says brain fog is very common during perimenopause, and that dementia at midlife is very rare, so these lapses usually aren’t a sign of something serious.

Headaches and migraines

Headaches can become more frequent, and migraines may change as estrogen levels rise and fall.

Vaginal dryness, lower libido and painful sex

Falling estrogen can cause vaginal dryness, burning, irritation and discomfort during sex. These genitourinary symptoms can start in perimenopause but often appear or worsen after menopause, and unlike hot flashes, they tend not to go away on their own.

Bladder changes

Needing to pass urine more urgently and recurring urinary tract infections (UTIs) are more common as estrogen falls.

Joint aches and muscle loss

Mild joint aches and pains are common around menopause. Muscle mass also declines more quickly, which is one reason strength training matters so much at this stage. Our beginner’s guide to strength training for women over 50 is a good place to start.

Weight gain

Many women gain weight, especially around the middle. The Menopause Society notes that diet and physical activity can help limit midlife weight gain.

Skin and hair changes

Skin often becomes drier and thinner, and hair may thin. See our anti-aging skincare routine for women over 40 and our guide to hair thinning in women for what helps.

Other symptoms

Heart palpitations, breast tenderness, worse PMS, dry eyes and a dry mouth are also reported.

Symptom	How common	What often helps
Irregular periods	Very common	Tracking cycles; see a doctor about unusual bleeding
Hot flashes and night sweats	Up to 80% of women	Layers, cooling, HRT, non-hormonal medicines, CBT
Sleep problems	Common	Sleep routine, treating night sweats, CBT
Mood changes and anxiety	Common	Exercise, talking therapy, HRT, antidepressants if needed
Brain fog	Common, usually mild	Sleep, lists and routines; often improves after menopause
Vaginal dryness	Common, often later	Vaginal moisturizers, lubricants, vaginal estrogen
Joint aches	Common	Staying active, strength training
Weight gain	Common	Strength training, protein, gradual calorie control

How long do perimenopause symptoms last?

It varies a lot from woman to woman:

• Most symptoms: the HSE says most symptoms last around 4 years from your last period, but about 1 in 10 women have them for up to 12 years.
• Hot flashes: in the large US SWAN study of 1,449 women with frequent hot flashes or night sweats, published in JAMA Internal Medicine in 2015, symptoms lasted a median of 7.4 years in total. Women whose hot flashes started early, before or early in perimenopause, had them for longest, a median of more than 11.8 years.
• Differences between groups: in the same study, the median duration was 10.1 years for African American women, 8.9 years for Hispanic women, 6.5 years for non-Hispanic white women, 5.4 years for Chinese women and 4.8 years for Japanese women.

The Menopause Society notes that most symptoms improve after menopause even without treatment. Vaginal dryness is the main exception, as it often persists or gets worse.

Worked example: tracking your cycles

Because irregular periods are the clearest sign of perimenopause, tracking them is one of the most useful things you can do. It also gives your doctor real information instead of guesswork. Here’s an example of six months of cycle lengths for a 46-year-old woman:

Month	Cycle length	What it suggests
January	28 days	Her usual pattern
February	24 days	Slightly shorter: common early in perimenopause
March	25 days	Still shorter than usual
April	34 days	Varies by 9 days from March: 7 days or more suggests the transition is underway
May	29 days	Back to normal, which is typical of the ups and downs
June	63 days	A skipped period of 60 days or more: often a sign of the later transition

How to do it:

1. Note the first day of each period in a calendar or app. 2. Count the days from the first day of one period to the first day of the next. 3. Note how heavy the bleeding was, any spotting between periods, and symptoms such as hot flashes or poor sleep. 4. Take the record to your appointment.

Remember: a missed period in your 40s could also be pregnancy. If there’s any chance, take a pregnancy test.

Is it perimenopause or something else?

Several other conditions can look like perimenopause, so it’s worth seeing a doctor rather than assuming:

• Thyroid problems can cause tiredness, weight changes, mood changes, hair thinning and period changes.
• Pregnancy is still possible during perimenopause.
• Depression and anxiety can occur on their own, not only because of hormones.
• Iron deficiency from heavy periods can cause tiredness and brain fog.
• Unusual bleeding sometimes has other causes, such as fibroids or polyps, which need checking.

If you’re 45 or over, NICE says perimenopause can usually be diagnosed from your symptoms alone, without blood tests. Tests can still help rule out other causes, especially in younger women.

Contraception during perimenopause

You can still get pregnant during perimenopause, even if your periods are irregular, because you may still ovulate occasionally. The Menopause Society advises women who don’t want to become pregnant to keep using birth control until menopause is confirmed, one year after the final period. In the UK, women under 50 are usually advised to wait two years after their last period. Ask your doctor before stopping contraception, as the right timing can depend on your age and the method you use.

What helps with perimenopause symptoms?

You don’t have to just put up with symptoms. Options range from simple lifestyle changes to prescription treatments, and many women use a combination.

Lifestyle changes

• Move regularly. In a survey of more than 1,800 Flo app users in 87 countries, presented at The Menopause Society’s 2026 meeting, women who exercised more often reported lower overall symptom burden, especially for low mood, irritability and anxiety. This shows an association rather than proof that exercise caused the improvement, but staying active has many other benefits too. A brisk daily walk is a great start; see our 4-week walking plan.
• Build strength to protect muscle and bones.
• Keep cool with layers, a fan by the bed and breathable bedding.
• Protect your sleep with a regular bedtime and a cool, dark bedroom.
• Look after your mental health. Our small self-care habits for busy women are a realistic place to start.

Talking therapy

The UK’s National Institute for Health and Care Excellence (NICE) says in its 2024 menopause guideline that cognitive behavioral therapy (CBT) can be considered for hot flashes, night sweats, low mood and sleep problems, alongside hormone therapy or for women who can’t or prefer not to take it.

Hormone therapy (HRT)

The Menopause Society describes hormone therapy as effective for bothersome hot flashes and night sweats. It has benefits and risks that depend on your age, health and the type of hormones used, so it’s a decision to make with your doctor.

Non-hormonal prescription medicines

For women who can’t or don’t want to take hormones, newer non-hormonal medicines are available. The FDA approved fezolinetant in 2023 and elinzanetant in 2025 to treat moderate to severe hot flashes and night sweats caused by menopause. Some other medicines, including certain antidepressants, are also used. Your doctor can explain which might suit you.

Vaginal dryness

The Menopause Society recommends regular vaginal moisturizers, water-, silicone- or oil-based lubricants for sex, and avoiding soap, bath oils and bubble baths around the vulva. Low-dose vaginal estrogen, which your doctor can prescribe, is another option.

Honest pros and cons of the main treatment options

Option	Pros	Cons
Lifestyle changes	Free, safe, help mood, sleep, weight and long-term health	Effects on hot flashes are modest; takes consistency
CBT	No medication; helps hot flashes, mood and sleep	Takes several sessions; access varies
Hormone therapy (HRT)	Effective for hot flashes and night sweats; helps several symptoms	Not suitable for everyone; risks depend on your health and the type used
Non-hormonal medicines	Option for women who can’t or don’t want hormones	Prescription only; possible side effects; newer, with less long-term data
Vaginal moisturizers and lubricants	Available without a prescription; easy to use	Treat dryness only

Who should be careful

• Hormone therapy isn’t suitable for everyone. The Menopause Society says it’s generally not recommended for women with a history of breast or uterine cancer, unexplained vaginal bleeding or liver disease, and that taking estrogen by mouth raises the risk of blood clots. Your doctor will weigh this against your symptoms.
• If you’ve had blood clots, a stroke or heart disease, discuss every treatment option, including non-hormonal medicines, with your doctor.
• If you take other medicines or supplements, check with a pharmacist before adding anything for menopause symptoms, as some interact.
• If you’re still having periods, remember that pregnancy is possible, and some treatments aren’t contraceptives.

When to see a doctor

See your doctor or a menopause specialist if:

• Your symptoms are affecting your work, relationships, sleep or quality of life.
• You have very heavy periods, periods lasting much longer than usual, bleeding between periods or after sex.
• You have any bleeding after menopause, even spotting. The Menopause Society warns not to assume abnormal bleeding is simply part of menopause.
• Your periods stop or symptoms start before age 45.
• You feel persistently low, anxious or hopeless.
• You have palpitations with chest pain, breathlessness or dizziness.

If you ever have thoughts of harming yourself, get help right away: in the US, call or text 988 (Suicide and Crisis Lifeline); in the UK, call 111 or Samaritans on 116 123.

It can help to look for a clinician with menopause training. In the US, The Menopause Society lists Menopause Society Certified Practitioners (MSCP).

Frequently asked questions

The bottom line

Perimenopause symptoms usually begin in your 40s with changing periods, and can include hot flashes, night sweats, poor sleep, mood changes, brain fog, vaginal dryness and joint aches. Track your cycles and symptoms, keep using contraception until menopause is confirmed, and talk to your doctor if symptoms are getting in the way of your life. Between lifestyle changes, CBT, hormone therapy and newer non-hormonal medicines, there are more effective options than ever.

Sources

• The Menopause Society. Perimenopause.
• The Menopause Society. Symptoms.
• The Menopause Society. Higher physical activity frequency associated with lower symptom burden in perimenopause. October 2026.
• HSE (Ireland’s health service). Menopause symptoms.
• Avis NE, et al. Duration of menopausal vasomotor symptoms over the menopause transition. JAMA Internal Medicine, 2015. Summary.
• National Institute for Health and Care Excellence (NICE). Menopause: identification and management (NG23). Updated November 2024.
• Pharmacy Times. FDA approves elinzanetant for menopause vasomotor symptoms. October 2025.

Information checked as of October 2026. Read how we research and update articles in our editorial policy.

This article is for general information and isn’t a substitute for personal medical advice. Talk to your doctor about your symptoms and before starting or stopping any treatment or contraception. See our full medical disclaimer.