Stages

Understanding Perimenopause

Creator: Dr Nadira Awal
Published: 2026-01-15

The years leading up to your last period — symptoms, timing and what helps.

By Dr Nadira AwalBMS Specialist3 min readMedically reviewed 9 July 2026

A single flowering stem in a small ceramic vase on a linen napkin

Perimenopause is the transition into menopause, sometimes lasting a decade. Recognising the earliest hormonal signs — from mood shifts to changing cycles — lets you get support long before periods stop.

Perimenopause is the transition into menopause — it can start in your late 30s and last anywhere from 4 to 10 years. Hormones fluctuate wildly before they fall, and it's often this fluctuation, not the final drop, that produces the hardest years. Many women describe feeling 'not themselves' long before their periods become obviously irregular, which is why perimenopause is so frequently missed or misdiagnosed as anxiety, depression, thyroid disease or burnout.

Early signs to recognise

Cycle changes: shorter (every 21–24 days), longer, heavier, lighter or unpredictable periods.
Sleep disruption and early waking (2–4am) with a racing mind — often the earliest and most disabling symptom.
New anxiety, low mood, brain fog, tearfulness or a sense of 'not feeling like yourself'.
Worsening PMS, PMDD-like symptoms, or reactions to alcohol and caffeine you never had before.
Joint aches, frozen shoulder, migraines, palpitations, tinnitus and skin changes.
Vaginal dryness, urinary urgency and recurrent UTIs — often the last thing women mention.

A woman writing in a symptom-tracking journal at a kitchen table — A 4–6 week symptom diary is more useful in perimenopause than a single blood test.

What's happening biologically

Oestrogen production becomes erratic — surging one week (breast tenderness, heavy periods, migraines) and plunging the next (flushes, low mood, insomnia).
Progesterone falls earlier and more steadily, driving PMS-like symptoms, disturbed sleep and heightened anxiety.
Testosterone gradually declines through the 40s, affecting energy, libido, motivation and mental clarity.
The brain's oestrogen-sensitive networks — mood, memory, temperature regulation, pain perception — are all affected long before periods stop.

Why perimenopause is so often missed

Blood tests (FSH, LH, oestradiol) are unreliable in perimenopause because levels swing day to day.
NICE guidance is clear: in women over 45, diagnose from symptoms alone — no blood test is needed.
Symptoms overlap with thyroid disease, iron deficiency, depression and ADHD — a good history untangles them.
Cultural and workplace stigma still leads many women to normalise disabling symptoms.

Tracking your symptoms — what actually helps

Keep a simple symptom diary for 4–6 weeks: sleep, mood, cycle, hot flushes, brain fog and libido on a 0–10 scale.
Note the pattern across your cycle — perimenopausal symptoms often cluster in the second half.
Bring the diary to your consultation; it's more useful than any single blood test.
Free tools like the Balance app or a simple notebook work equally well.

Treatment options in perimenopause

HRT can be started in perimenopause — you do not have to wait for periods to stop.
Cyclical (sequential) HRT preserves a predictable monthly bleed if you're still having periods.
The Mirena intrauterine system handles the progestogen half of HRT elegantly and also controls heavy bleeding.
Transdermal oestradiol (patch, gel or spray) is first-line — it does not raise clot or stroke risk.
Testosterone can be added if libido, energy or motivation remain low on adequate oestrogen.
Non-hormonal options (CBT, SSRIs, gabapentin, fezolinetant) exist for women who cannot or prefer not to use HRT.

A woman in her forties strength-training with dumbbells — Strength training, protein and sleep are the three lifestyle levers with the strongest evidence in perimenopause.

Lifestyle foundations that make a real difference

Strength training 2–3 times a week protects bone, muscle mass and mood.
Protein-forward eating (1.2–1.6 g/kg/day) supports muscle and stabilises energy.
Prioritise sleep hygiene, cool bedrooms and a wind-down routine — sleep is the single biggest lever.
Alcohol worsens flushes, sleep and mood in perimenopause more than at any other stage of life.

What to raise with a specialist

Heavy, prolonged or unpredictable bleeding — always needs review.
Symptoms that are affecting work, relationships, parenting or driving.
Personal or family history of clots, breast cancer, migraine with aura or endometriosis — these shape the safest HRT regimen.
Contraception — you still need it for 2 years after your last period if under 50, or 1 year if over 50.

Key takeaway

Perimenopause is not a diagnosis of last resort — it's a distinct, treatable stage of life. Tracking your symptoms and seeing a clinician who takes perimenopause seriously is often the single most useful step you can take.

How Dr Awal approaches this in clinic

Every consultation starts with your full story — symptoms, cycle, medical history, family history and what you've already tried. From there we look at whether hormonal treatment, non-hormonal options, lifestyle changes or a combination will give you the best result, and we tailor the plan to your age, risk factors and preferences.

A detailed 60 minute first appointment — no rushed 10-minute slots.
Evidence-based recommendations aligned with NICE NG23 and BMS guidance.
Body-identical HRT considered first-line where appropriate.
Shared-care letters sent to your NHS GP so treatment can continue affordably.
Follow-up at 3 months to fine-tune your regimen and address side effects.
Ongoing annual reviews so your plan evolves with you.

Common questions we hear about this

Do I need to be at a certain age to be seen?

No. We see women in early perimenopause (often late 30s and 40s), through post-menopause and beyond. Age alone doesn't decide whether treatment is right — symptoms, health history and goals do.

Will my GP continue the prescription?

In most cases yes. After your consultation we send a detailed shared-care letter with the diagnosis, treatment plan and rationale so your NHS GP can prescribe on the NHS. Not every practice accepts shared care — we'll discuss this in your appointment.

What if I've tried HRT before and it didn't suit me?

Very common — often the type, dose or route wasn't right rather than HRT itself. We review what you've tried, why it didn't work, and adjust accordingly. Many women who thought HRT wasn't for them do well on a different preparation.

How long will I need to stay on treatment?

There is no set upper time limit for HRT. Current BMS and NICE guidance supports continuing HRT for as long as the benefits outweigh the risks for you personally. We review this together every year so you stay in control of the decision.

Where do you see patients?

All consultations at Pause and Co Healthcare are conducted securely via video, allowing us to support patients anywhere in the UK. Prescriptions and shared care arrangements are managed in the same way, regardless of your location.

About the author

Dr Nadira Awal is a British Menopause Society Advanced Menopause Specialist with 15+ years' NHS and private experience. She holds the BMS Advanced Certificate in Menopause Care, sits on the BMS Programme Planning Group, and advises the UK Government Menopause Strategy Group. Read her full profile.

Sources & further reading

General information only — not a substitute for personalised medical advice. Always speak to your GP or a menopause specialist about your own situation.

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