Understand this symptom
Hot flushes and night sweats in menopause
Written by
Uma Health
Medically verified by
Dr. William Declerck
Physician
Insight
The essentials
This symptom is caused by the hormonal shifts your body is going through. Understanding what's happening helps you better cope with what you're feeling.
The cause
Your oestrogen fluctuates and falls in menopause, and that most likely upsets the thermostat in your brain. Your body decides it is too warm sooner than it used to and tries to shed the heat: blood vessels open, your skin flushes, you sweat. At night we call this a night sweat. Alcohol, hot drinks, spicy food, stress and a warm room make it worse for many women.
What helps
Layers you can peel off quickly, a cool bedroom, breathable bedding and learning your personal triggers. If the symptoms weigh heavily on your sleep or your days, hormone therapy is the most effective treatment, and there are non-hormonal options too. A care provider who knows menopause well can work out what fits you.
Honest and transparent
The most frequently asked questions
They can catch you off guard and wreck your nights, and still they usually just come with the territory. Around three in four women get hot flushes or night sweats during menopause, which doctors call vasomotor symptoms. Exactly how many depends on how researchers define the symptom and which group of women they followed. They are the clearest, most recognised sign that your hormones are changing.
A good question, because it is largely the same mechanism at a different time. A hot flush is a sudden wave of heat during the day, often across your face, neck and chest, sometimes with a red face and a racing heart. A night sweat is essentially that same heat surge while you sleep, leaving you to wake up drenched and change the sheets. Night sweats can also have causes other than menopause, and how intense they get varies a lot from woman to woman.
The question everyone in the middle of it wants answered, and the honest answer asks for patience. Research that followed women for years shows the symptoms last around seven years on average, and for many women continue for about four more years after the final period. That is an average, and the spread is wide: for one woman it is over within a year, for another it lasts far longer. They usually do ease gradually over time. You don't have to sit those years out in silence: there is a lot you can do.
A few things are worth trying yourself, even before you see a doctor. Turn your bedroom cooler and air it well, choose cotton or other breathable bedding rather than synthetic fabric, and keep layers within reach so you can peel one off quickly. Skip alcohol, spicy food and hot drinks in the evening and see whether it helps. If you still wake up drenched, know that it is treatable.
A sensible instinct to look wider, because menopause is not the only explanation. An overactive thyroid, an infection, certain medications and sometimes hormone treatments can all cause night sweats, and very rarely something more serious sits behind them, such as lymphoma. If you sweat through until your sheets are wet, alongside weight loss, fever or swollen glands, have it checked.
A logical question, and here the guidelines are clear. Hormone therapy is the most effective treatment for hot flushes and night sweats, according to both the Belgian Menopause Society and NICE. If you can't or would rather not take hormones, there are non-hormonal options: a form of cognitive behavioural therapy aimed at menopause, and a newer medicine that dampens the symptoms in the brain.
You are sitting calmly at the table and suddenly a wave of heat rolls through your body, from your chest up into your face. Or you wake at three in the morning, drenched, with sheets you have to change. Maybe you suspect this belongs to menopause. Maybe you wonder why your body reacts this way. Here you will find an answer: what actually happens, how long it lasts, what sets it off and what helps.
How women describe it
"It comes out of nowhere, like someone switching on a furnace inside me."
"I wake up soaking wet every night."
"During the day I suddenly go red in the face, always at the wrong moment."
"I toss and turn, kick the duvet off, then pull it back on."
Sound familiar? You are far from alone. Around three in four women run into hot flushes or night sweats during menopause.1,2 That figure shifts between studies, depending on the definition and the group studied. Doctors call them vasomotor symptoms. For most women they are the clearest sign that menopause has begun.
What happens in your body
Your body normally keeps its core temperature within a narrow, comfortable band. Above that band you sweat to cool down, below it you shiver to warm up. In between sits a zone where you feel nothing at all.
In menopause that zone gets narrower. The likely mechanism: as your oestrogen fluctuates and falls, a small group of nerve cells in the hypothalamus, the thermostat of your brain, becomes overactive.3 Those cells work through a signalling substance called neurokinin B, and they set your comfort zone narrower. A small rise in body temperature you would not even have noticed before now reads as "too hot". Your body springs into action to shed that heat: the blood vessels in your skin open, you flush and feel warm, and you start to sweat.4 That is a hot flush. When it happens at night, it wakes you up drenched.
That same overactive thermostat also explains why a hot flush sometimes comes with a pounding heart. If a racing heart is what you notice most, read our page on heart palpitations too.
How long does it last?
The honest answer: longer than most women expect.
Large studies that followed women for years show hot flushes and night sweats last around seven years on average, and for many women continue for about four years after the final period.5 For some they are gone within a year; for others they drag on longer. They usually do become milder over time. The severity varies widely too: one woman feels the occasional mild warm wave, another has several fierce surges a day and night. How often and how badly you get them says nothing about how long they will stay.
It sounds heavy. We say it anyway, because you deserve an honest answer. Women who assume it will "be gone in a few months" often feel let down when it isn't. The symptoms are real, they have been measured, and you don't have to endure them in silence.
What sets a hot flush off
Beyond your hormones, everyday things can bring a hot flush on faster. The most commonly reported are alcohol, caffeine and hot drinks, spicy or hot food, smoking, stress and a warm or stuffy environment.
Not everyone reacts to the same things. The easiest way to find your own triggers: for a couple of weeks, briefly note when a flush appears and what you ate, drank or were doing beforehand. Patterns show up that you would otherwise miss.
What you can do yourself
There is no magic fix, but a few practical changes give you more grip.
Work with layers you can take off and put back on quickly, and choose clothing and bedding in cotton or other breathable material. Keep your bedroom cool and air it before bed; a fan next to the bed helps many women. Keep a glass of water and maybe a damp flannel within reach, so that during a night-time surge you can cool your wrists or neck quickly without waking fully. Cut back on alcohol and hot drinks in the evening, and move caffeine to earlier in the day. Stopping smoking and working towards a healthy weight reduce the symptoms for some women.
Your mind plays a part too. A flush feels more intense when it sends you into a panic. Slow, calm breathing in the moment helps some women ride out the wave. If night sweats disrupt your sleep again and again, look at sleep problems as well: poor sleep makes almost every menopause symptom heavier.
Does hormone therapy help?
Here the guidelines are clearer than for most other menopause symptoms. Hormone therapy is the most effective treatment for hot flushes and night sweats. Both the Belgian Menopause Society and the UK's NICE guideline say so plainly.1,2,6,7 For many women it reduces the symptoms substantially, usually within a few weeks.
If you can't or would rather not take hormones, there are non-hormonal options. A form of cognitive behavioural therapy aimed specifically at menopause symptoms reduces how much hot flushes bother you, even though it doesn't make them disappear. There is also a newer, non-hormonal medicine, fezolinetant, that dampens exactly the brain pathway that triggers hot flushes. NICE recommends it for moderate to severe symptoms when hormone therapy is unsuitable. Certain antidepressants at a low dose and the medicine gabapentin are sometimes prescribed when hormones aren't an option; they are less powerful, but can take the edge off.
Which route is useful and safe for you depends on your situation, your history and your own preference. A care provider who knows menopause well can weigh that up with you.
When night sweats need a doctor
Hot flushes and night sweats usually belong to menopause. Still, there are signs where it is worth having them checked, even though the chance of anything else is small.
See your GP if you sweat so much that your sheets or nightclothes are genuinely wet, night after night, and especially if other symptoms come with it: unintended weight loss, fever, a persistent cough or swollen glands in your neck, armpits or groin. It is also worth a check when night sweats appear without any other signs of menopause, or at an age that doesn't fit menopause.
Other things can sit behind night sweats: an overactive thyroid, an infection, certain medications, and very rarely lymphoma. A conversation and usually a blood test at your GP rule those causes out quickly. In the large majority of cases it turns out to be menopause after all, and then you have the reassurance in black and white. Asking for that check is a sensible step. Clarity brings calm.
Where to find help
Are the hot flushes or night sweats weighing on your sleep, your work or your mood? You don't have to figure this out alone.
Your GP (huisarts) is a good first stop. With a conversation and a blood test if needed, they can rule out other causes, take the first steps and refer you to a gynaecologist. Some Belgian hospitals also run a dedicated menopause clinic. Feel free to bring a short note of how often your symptoms happen, how bad they are and what you have already tried; it makes the conversation more concrete straight away.
Want to talk directly to someone who works on menopause every day? On Uma you will find care providers who specialise in (peri)menopause. Your consultation takes place online, you discuss all your symptoms together, including the ones you hadn't yet connected, and you leave with a concrete plan. Uma is active mainly in Belgium, the Netherlands, Luxembourg and France, but any woman in Europe can consult a care provider on Uma. Prescriptions are valid across Europe.
Sources
- Rozenberg, S. et al. (2026). Guidelines Menopause. Belgian Menopause Society.
- National Institute for Health and Care Excellence (2024). Menopause: identification and management. NICE Guideline NG23.
- National Institute for Health and Care Excellence (2026). Fezolinetant for treating moderate to severe vasomotor symptoms associated with menopause. NICE Technology Appraisal TA1143.
- Lee, E. et al. (2022). Vasomotor symptoms of menopause, autonomic dysfunction, and cardiovascular disease. American Journal of Physiology — Heart and Circulatory Physiology.
- Avis, N.E. et al. (2015). Duration of Menopausal Vasomotor Symptoms Over the Menopause Transition (SWAN). JAMA Internal Medicine, 175(4), 531–539.
- BCFI (2025). Hormone therapy during perimenopause: benefits and drawbacks.
- RIZIV/INAMI (2024). Consensus conference: The management of menopause.
The content on this page is intended for informational purposes and does not replace medical advice. Please consult a physician for a personal assessment.