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Health condition · Clinically reviewed

Hot flushes, the biology, and every treatment that actually helps.

Up to 80% of women get them, a quarter describe them as severe, and the median duration is about seven years. There is a lot we can do about that.

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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against NICE NG23, British Menopause Society and peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK practice including fezolinetant, transdermal HRT and CBT for vasomotor symptoms.

Key facts

Hot flushes at a glance.

The essentials, in plain English - what a flush actually is, how long they last, and what modern UK care looks like.

  • What it is

    Vasomotor symptoms - sudden heat, flushing and sweating driven by a narrowed thermoneutral zone in the hypothalamus.

  • How common

    Up to 80% of women experience hot flushes around menopause and roughly a quarter describe them as severe.

  • How long

    The SWAN study found a median duration of about 7 years - not the short-lived symptom many assume.

  • The biology

    Falling oestrogen disinhibits hypothalamic KNDy neurons - neurokinin B signalling narrows the thermoneutral zone.

  • Gold-standard care

    HRT is the most effective treatment for moderate-to-severe symptoms in suitable women per NICE NG23.

  • Non-hormonal option

    Fezolinetant (Veozah), an NK3 antagonist, is a practice-changing non-hormonal treatment approved in the UK in 2024.

Why this guide matters

Not just something to put up with.

Vasomotor symptoms disrupt sleep, mood, work and relationships. The three points below shape the treatment ladder on this page.

  • The mechanism is understood

    Falling oestrogen disinhibits hypothalamic KNDy neurons - neurokinin B narrows the thermoneutral zone and drives the flush.

  • HRT is highly effective

    For moderate-to-severe symptoms without contraindications, HRT remains the most effective treatment per NICE NG23.

  • Non-hormonal options are excellent

    SSRIs, gabapentin, CBT and the new NK3 antagonist fezolinetant all work well when HRT is not appropriate or wanted.

How the diagnosis is made

From first flush to a clear plan.

The steps a UK GP or menopause specialist will normally follow - so you know what to expect and why.

  1. 01

    Assessing

    History and menopause staging

    Cycle pattern, symptom timing and STRAW+10 staging - perimenopause, menopause or postmenopause.

  2. 02

    Assessing

    Impact and quality of life

    Sleep, mood, work and relationships - a structured check on how much symptoms are affecting daily life.

  3. 03

    Assessing

    Medication and trigger review

    Tamoxifen, androgen deprivation, opioids, SSRIs and niacin can all cause flushing - as can alcohol and spicy foods.

  4. 04

    Confirming

    Red-flag screen

    Weight loss, tremor, palpitations or diarrhoea point away from menopause - consider thyroid, phaeochromocytoma or carcinoid.

  5. 05

    Confirming

    Bloods when indicated

    TSH is the most useful test. LH and FSH are only helpful in selected under-45s or after hysterectomy.

  6. 06

    Planning

    Specialist menopause referral

    Complex risk profiles, treatment failure or hormone-sensitive cancer history warrant a specialist menopause clinic.

  7. 07

    Planning

    Individualised plan

    A shared decision on HRT, non-hormonal medication, CBT or fezolinetant, calibrated to symptoms and risk.

Typical timeline: a first visit to a settled plan in a single consultation for most women.

Symptoms

What a hot flush actually feels like.

A stereotyped sequence - sudden heat, flushing, sweating, palpitations, chills - and the wider knock-on effects on sleep and mood.

  • Sudden heat

    A wave of intense warmth that rises through the chest, neck and face - usually lasting one to five minutes.

  • Flushing and redness

    Visible reddening of the face, neck and upper chest as blood vessels dilate to lose heat.

  • Sweating

    Drenching sweats that can soak clothing and bedding - often followed by chills as the body overcorrects.

  • Palpitations

    A racing or pounding heartbeat during the flush - alarming but not usually dangerous in menopause.

  • Anxiety and irritability

    A surge of anxiety often accompanies the flush - part of the autonomic response, not a separate problem.

  • Night sweats

    The nocturnal form - waking drenched, throwing off covers and struggling to fall back asleep.

  • Insomnia and fatigue

    Broken sleep from night sweats drives daytime fatigue, low mood and cognitive fog.

  • Red flag - atypical features

    Weight loss, tremor, sustained tachycardia or diarrhoea deserve a search beyond menopause.

Treatment

How hot flushes are treated in the UK.

Lifestyle and HRT first-line where suitable, with excellent non-hormonal alternatives - including fezolinetant, the practice-changing NK3 antagonist.

  • Lifestyle first

    Cool environments, layered clothing, weight management, exercise, stopping smoking and stress reduction all reduce flush frequency.

  • HRT - transdermal

    Patches or gel avoid first-pass metabolism and carry a lower VTE risk than oral - often the preferred route in UK practice.

  • HRT - oral

    Effective and well tolerated for many women - individualised against VTE, breast and cardiovascular risk per NICE NG23.

  • Local vaginal oestrogen

    For genitourinary syndrome of menopause - low-dose, safe for long-term use even in most women who cannot take systemic HRT.

  • SSRIs and SNRIs

    Paroxetine, citalopram, escitalopram, venlafaxine and desvenlafaxine reduce flushes - avoid paroxetine with tamoxifen (CYP2D6).

  • Gabapentin or pregabalin

    Useful for troublesome night sweats and where sleep is the dominant complaint. Titrate at bedtime to limit daytime drowsiness.

  • Fezolinetant (Veozah)

    An NK3 receptor antagonist - non-hormonal, targets KNDy neurons directly. NICE-approved in 2024 for moderate-to-severe VMS.

  • CBT for menopause

    Structured cognitive behavioural therapy reduces the impact and distress of flushes - now recommended by NICE NG23.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or menopause specialist knows your history and can tell you which parts apply to you. If in doubt, get seen.

  • NICE. Menopause: diagnosis and management (NG23).

  • British Menopause Society (BMS). Consensus statements on HRT and non-hormonal treatment.

  • NICE. Fezolinetant for treating vasomotor symptoms caused by menopause (2024).

  • SWAN Study. Duration of menopausal vasomotor symptoms over the menopause transition.

  • MHRA. HRT prescribing safety updates.

Red flags

When flushing isn’t menopause.

Most vasomotor symptoms are menopausal. These are the features that should prompt a wider search.

  • Rapid weight loss

    Unintentional weight loss with sweats and tremor suggests hyperthyroidism - check TSH and consider Graves’ disease.

  • Episodic hypertension

    Paroxysmal blood pressure spikes with sweating and palpitations warrant phaeochromocytoma screening.

  • Diarrhoea and flushing

    Flushing with diarrhoea and wheeze can point to carcinoid syndrome - refer for urinary 5-HIAA testing.

  • Hormone-sensitive cancer

    Flushes on tamoxifen, aromatase inhibitors or androgen deprivation need oncology-aware, non-hormonal management.

  • New unexplained bleeding

    Postmenopausal bleeding is a two-week-wait referral - never assume it is menopause alone.

  • Persistent tachycardia

    A sustained resting tachycardia between flushes is not typical menopause - investigate cardiac or thyroid causes.

  • Severe mood change or suicidality

    Menopause carries a real mental-health burden - urgent GP or crisis support if thoughts of self-harm occur.

  • Drenching night sweats with fever

    Fever, weight loss and drenching sweats can signal infection or lymphoma - not vasomotor symptoms.

  • Opioid or SSRI withdrawal

    Sudden discontinuation can mimic menopausal flushing - review medication history carefully.

Living with it

A treatable phase, not a life sentence.

Four practical shifts that make the biggest daily difference - alongside whichever medical treatment you choose.

A quiet reminder

Sleep is the fastest win.

Treating night sweats early - whether by HRT, fezolinetant or gabapentin - is often what changes everything else.

  1. 01 Environment

    Keep the room cool

    A fan by the bed, breathable cotton bedding and a lower ambient temperature all reduce night-sweat severity.

  2. 02 Triggers

    Know your patterns

    Alcohol, spicy food, caffeine and stress are the common triggers - a two-week symptom diary is often revealing.

  3. 03 Sleep

    Protect sleep like medicine

    Consistent bedtimes, a wind-down routine and treating night sweats early prevent the cascade into fatigue and low mood.

  4. 04 Escalate

    Ask for a review at 12 weeks

    If your first plan isn’t enough after three months, ask about switching route, dose or moving to fezolinetant or CBT.

Frequently asked

Everything we get asked about hot flushes.

Quick answers on cause, duration, HRT, non-hormonal options and fezolinetant.

  • What causes hot flushes?

    Falling oestrogen disinhibits hypothalamic KNDy neurons, which use neurokinin B to signal the temperature-control centre. This narrows the thermoneutral zone, so small rises in core temperature trigger a full heat-loss response - flushing, sweating and a racing heart.

  • How long do hot flushes last?

    The SWAN study found a median duration of about 7 years, and roughly a third of women continue to have flushes for more than a decade. They are not a short-lived symptom, which is one reason effective treatment matters.

  • Is HRT the best treatment?

    For moderate-to-severe vasomotor symptoms in women without contraindications, HRT remains the most effective treatment per NICE NG23. Transdermal preparations carry a lower VTE risk than oral. The decision is always individualised against breast, cardiovascular and bone risk.

  • What if I cannot take HRT?

    There are excellent non-hormonal options: SSRIs and SNRIs (avoiding paroxetine with tamoxifen), gabapentin or pregabalin, clonidine, oxybutynin, CBT for menopause and now fezolinetant - a non-hormonal NK3 receptor antagonist NICE-approved in 2024.

  • What is fezolinetant?

    Fezolinetant (Veozah) is a neurokinin-3 receptor antagonist. It blocks the KNDy pathway that drives vasomotor symptoms, so it treats the underlying mechanism without hormones. It is prescribed by menopause specialists for moderate-to-severe flushes.

  • When should I worry a flush isn’t menopause?

    Weight loss, tremor, sustained tachycardia, episodic hypertension, diarrhoea with wheeze, fever or postmenopausal bleeding all point away from simple menopause. In those cases we screen for thyroid disease, phaeochromocytoma, carcinoid syndrome or other causes.

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