Perimenopause after 40: the symptoms nobody talks about
Perimenopause is the period of symptoms before your periods stop for good. According to the NHS, symptoms usually last 7–9 years and include not only hot flushes but also mood changes, "brain fog", disturbed sleep, palpitations, joint pain and urinary complaints. You should see a doctor if the symptoms are bothering you, if you have palpitations, heavier bleeding, and for any bleeding after 12 months without a period.
- Symptoms usually last 7–9 years and change over time (NHS).
- The earliest symptoms are often changes in mood, sleep and memory, not hot flushes.
- Hormonal contraception can mask perimenopause.
- Bleeding after 12 months without a period is always checked – it can be a sign of cancer, which is treatable when found early (NHS).
What is perimenopause and how long does it last?
Perimenopause is the period when symptoms appear but your periods have not yet stopped for good. According to the NHS, symptoms usually last 7 to 9 years, sometimes longer, and can change over time – for example, hot flushes may give way to anxiety or low mood. Some of them (joint pain, vaginal dryness) can continue after menopause. The HSE notes that symptoms can start up to 7 years before periods stop.
Which symptoms affect mood and thinking?
The NHS describes changes in mood, low mood or depression; poorer memory, difficulty concentrating and "brain fog"; irritability, stress and anxiety, often linked to sleep disturbances.
What are the physical symptoms?
- Changes to your periods – more or less often, heavier or lighter, until they stop completely.
- Hot flushes and night sweats – sudden heat or cold in the face, neck and chest, with heavy sweating, palpitations, anxiety or dizziness, lasting a few minutes.
- Sleep problems – difficulty falling asleep or staying asleep.
- Weight gain, often around the stomach and upper body.
- Vaginal dryness, burning, irritation or itching, which can make intimacy painful.
- More frequent urinary infections or similar complaints, needing to pee more often, including at night; incontinence.
- A faster, slower or more noticeable heartbeat (palpitations).
- Weakening of the bones, which can lead to osteoporosis.
- Headaches and migraines that are worse than usual; muscle and joint pain.
- Thinning hair or hair loss; dry and itchy skin; reduced sex drive; sensitive teeth and painful gums.
Why do so many women not get an answer?
The symptoms are many and varied, they appear gradually and are easily put down to stress or tiredness. The NHS notes that hormonal contraception makes recognising it even harder – progestogen methods can make your cycle irregular or stop it, while the combined pill causes monthly bleeds for as long as you take it. That is why recording your symptoms over time, alongside your cycle, is often what makes the picture visible to you and to your doctor.
When should you see a doctor?
The NHS recommends an appointment if:
- you think you have perimenopause symptoms and want to know what the options are;
- you have palpitations;
- you are still having periods but are bleeding more than before;
- you have any vaginal bleeding after 12 or more months without a period – even a single episode, light bleeding or pinkish-brown discharge.
According to the NHS, bleeding after menopause is usually not serious, but it can be a sign of cancer, which is easier to treat when found early. Early advice helps to limit the impact of perimenopause on your health, relationships and work.
Can you get pregnant during perimenopause?
Yes. The NHS reminds you that contraception is still needed for one year after your last period if you are 50 or over, and for two years if you are aged 40–49. The combined pill is not recommended after 50; your doctor may suggest a progestogen method.
Frequently asked questions
Is there a test for perimenopause?
The HSE states that a doctor usually confirms menopause from your symptoms; a blood test for hormones may be offered, especially if you have symptoms before the age of 45.
At what age does perimenopause start?
Menopause usually happens between the ages of 45 and 55 (NHS), and perimenopause symptoms can start up to 7 years earlier (HSE). Around 1 in 100 women go through it before the age of 40.
Are hot flushes the first symptom?
Not necessarily. The NHS describes changes in mood, sleep and concentration as part of the picture and notes that symptoms change over time.
Sources
- NHS – Menopause: Symptoms – last reviewed by the NHS: 19 May 2026
- HSE (Ирландия) – Menopause – duration and when to see a doctor
Informational article retold in our own words from the sources listed. It does not replace a consultation with a doctor; in an emergency call 112. If you spot an inaccuracy, write to [email protected].