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PERIMENOPAUSE SYMPTOMS
The Complete Guide for Women
in their 40s
The most common perimenopause symptoms are irregular periods, hot flashes, night sweats, poor sleep, mood changes and vaginal dryness. They usually begin in your 40s, when estrogen and progesterone start to rise and fall unevenly, and they can continue until 12 months after your final period. Many women also notice fatigue, brain fog, aching joints and weight gain around the middle.
This guide covers the early signs, the full list of symptoms, how long they last and when to see a doctor. If you want a quick read on your own symptoms, take our free perimenopause symptom checker.
What is perimenopause?
Perimenopause is the transition before menopause, when your body is getting ready to stop having periods. It is caused by changes in two key hormones, estrogen and progesterone, and many symptoms are linked mainly to falling estrogen. (Mayo Clinic)
Perimenopause ends when you have gone 12 months in a row without a period. That point is menopause. Everything after it is postmenopause.
When do perimenopause symptoms start?
Most women notice changes sometime in their 40s, but some notice them as early as their 30s or as late as their 50s. Cleveland Clinic says perimenopause usually starts in the mid-40s and begins about 8 to 10 years before menopause. (Mayo Clinic; Cleveland Clinic)
Some things can bring it on earlier:
- Smoking: smokers reach menopause about 1 to 2 years earlier.
- Family history: early menopause in close relatives may mean early menopause for you.
- Cancer treatment: chemotherapy and pelvic radiation are linked to early menopause.
- Surgery: a hysterectomy or removal of one ovary can sometimes lead to earlier menopause.
- Some health conditions: thyroid disease, rheumatoid arthritis and other autoimmune diseases may make early menopause more likely.
Read more in the stages of perimenopause, explained.
Perimenopause ends when you have gone 12 months in a row without a period. That point is menopause. Everything after it is postmenopause.
What are the early signs of perimenopause?
The clearest early sign is a change in your periods. Mayo Clinic says cycles that differ by 7 or more days suggest early perimenopause, and gaps of 60 days or more between periods suggest late perimenopause.
Other early signs many women notice first:
- Waking in the night, even without night sweats
- Worse PMS, irritability or a shorter fuse
- New anxiety or low mood
- Feeling tired all the time
- Hot flashes, often starting at night
A 2026 study in the journal Menopause, using data from more than 17,000 people in 158 countries, found a clear gap between expectations and reality. People most often associated perimenopause with hot flashes, but those who said they were in perimenopause reported exhaustion and fatigue far more often than hot flashes. (Mayo Clinic News Network)
The full list of perimenopause symptoms
Symptoms vary a lot from woman to woman. These are the ones listed by Mayo Clinic, Cleveland Clinic and the NHS.
Period changes
- Irregular periods: closer together, further apart or skipped
- Heavier or lighter bleeding than usual
Hot flashes and sleep
- Hot flashes and night sweats (hot flashes at night)
- Trouble falling or staying asleep (perimenopause insomnia)
- Palpitations: a faster or more noticeable heartbeat
Mood and mind
- Mood swings and irritability (mood changes in perimenopause)
- Anxiety, low mood or depression (perimenopause depression and anxiety)
- Poor memory, brain fog and trouble concentrating (perimenopause brain fog)
- Fatigue and low energy (perimenopause fatigue)
Body changes
- Weight gain, often around the stomach (perimenopause weight gain)
- Muscle aches and joint pains (aching joints in perimenopause)
- Headaches and migraines that are worse than usual
- Hair thinning or hair loss
- Dry and itchy skin
- Sensitive teeth, painful gums or other mouth problems
Vaginal, bladder and sexual health
- Vaginal dryness, burning or itching, which can make sex painful (perimenopause vaginal dryness)
- Lower sex drive
- Needing to pee more often or more urgently, and leaking urine
- More urinary infections
Changes you cannot feel
- Bone loss: bone is lost faster than it is replaced, which raises the risk of osteoporosis.
- Cholesterol changes: LDL (“bad”) cholesterol may rise and HDL (“good”) cholesterol may fall, which together raise the risk of heart disease.
Sources for this list: Mayo Clinic, Cleveland Clinic and NHS. For a longer printable version, see the full perimenopause symptoms checklist.
How long do perimenopause symptoms last?
Cleveland Clinic puts the average length of perimenopause at about four years, though it can last up to eight. The NHS says menopause symptoms usually last 7 to 9 years in total, sometimes longer, and some symptoms, such as joint pain and vaginal dryness, can continue after menopause. Symptoms also change over time. Hot flashes may ease and be replaced by low mood or anxiety.
Can you still get pregnant during perimenopause?
Yes. Pregnancy is less likely but still possible while you are having periods. If you do not want to get pregnant, keep using birth control until 12 months after your last period, or until your doctor says it is safe to stop. (Cleveland Clinic)
Perimenopause symptoms when you are raising kids
Perimenopause often lands at the busiest time of life. Broken sleep from night sweats adds to broken sleep from a sick child. A shorter fuse can show up in school-run arguments. Brain fog makes the family calendar harder to hold in your head.
None of that means you are failing. These are common symptoms with real causes, and many of them can be eased. Naming what is happening is often the first step to getting help.
How is perimenopause diagnosed?
Usually without any tests. Doctors look at your age, symptoms and cycle changes. UK guidance from NICE says perimenopause can be diagnosed without lab tests in otherwise healthy women over 45, based on hot flashes and irregular periods. (NICE)
Hormone tests are less useful than many women expect, because hormone levels change from day to day. Read is there a test for perimenopause? for what tests can and cannot show.
What helps with perimenopause symptoms?
No treatment stops perimenopause, but many symptoms can be eased. Options include:
- Hormone therapy: estrogen, or estrogen with progesterone
- Non-hormonal medicines: some antidepressants and gabapentin can help hot flashes
- Birth control pills: can steady hormone levels
- Vaginal treatments: prescription and over-the-counter creams and lubricants for dryness
- Lifestyle changes: a balanced diet, weight-bearing exercise, a cooler bedroom, less alcohol and caffeine, no tobacco, and stress management
Source: Cleveland Clinic. Talk to your doctor about which options suit you. If you are considering supplements, read perimenopause supplements: what the evidence supports first.
When should you see a doctor?
See a doctor if your symptoms bother you or affect your daily life. Do not wait for your next routine visit if you have:
- Very heavy bleeding or large blood clots
- Bleeding that lasts longer than 7 days
- Bleeding between periods or after sex
- Periods that come less than 21 days apart
- Any bleeding after you have gone 12 months without a period
- Palpitations
(Mayo Clinic; NHS)
If low mood comes with thoughts of harming yourself, get help now. In the US or Canada, call or text 988. In the UK, call Samaritans on 116 123. In Australia, call Lifeline on 13 11 14.
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Frequently Asked Questions
The most common first sign is a change in your cycle: periods that come closer together, further apart, heavier or lighter. Other early signs include worse PMS, waking in the night, new anxiety or irritability, fatigue and hot flashes. Many women notice these in their 40s.
Most women notice changes in their 40s, often in the mid-40s. Some notice them as early as their late 30s and some not until their 50s. Smoking, family history, some surgeries and cancer treatment can make it start earlier.
Perimenopause lasts about four years on average and can last up to eight. Menopause symptoms in total usually last 7 to 9 years, sometimes longer. Some symptoms, such as vaginal dryness and joint pain, can continue after menopause.
Usually not. Hormone levels change from day to day, so one result can look normal. Doctors usually diagnose perimenopause from your age, symptoms and cycle changes. A test may be used if you are under 45 or your symptoms are unusual.
Yes. Pregnancy is less likely but still possible while you are having periods. Keep using birth control until 12 months after your last period, or until your doctor says it is safe to stop.N
Sources
- Mayo Clinic. Perimenopause: symptoms and causes.
- Cleveland Clinic. Perimenopause.
- NHS. Symptoms of menopause and perimenopause.
- NICE. Menopause: diagnosis and management (NG23), recommendations.
- Mayo Clinic News Network. Global study identifies gap between expectations and experience in perimenopause, 2026.
This article is for information only and is not medical advice. It cannot diagnose or treat any condition. Speak to a qualified health professional about your symptoms. MomBliss HQ may earn a commission from some links on this site, at no extra cost to you.