Key takeaways
- A hot flush is a brain signal problem, not a "heat" problem in the body. The thermostat in the brain becomes too sensitive.
- In the SWAN study, frequent hot flushes lasted a median of 7.4 years in total, and longer in women whose flushes started early.
- Menopausal hormone therapy is recommended by NICE as the first-line treatment for hot flushes, after discussing benefits and risks.
- The Menopause Society's 2023 review recommends CBT, clinical hypnosis, some antidepressant-class medicines, gabapentin and newer brain-targeted medicines as non-hormonal options.
- Cooling tricks and avoiding triggers make flushes more bearable, but trials have not shown they reduce how often flushes happen.
What does a hot flush feel like?
Women describe it in so many ways. A wave of heat rising from the chest to the face. Sudden sweating on the scalp or upper lip. Skin flushing red. A racing heart. Some feel anxious just before it starts. Then, as it passes, a chill. A flush usually lasts a few minutes, but it can feel much longer when you are standing in front of a meeting.
In Hindi many women simply say "garmi chadh jaati hai". In Mumbai's humidity, especially in a crowded local train or a kitchen with the gas on, a flush can feel unbearable, and many women assume it is just the weather. But if the heat comes in sudden waves while everyone around you feels fine, it is worth thinking about hormones.
See, I'll tell you something personal. About two years ago, I had hot flashes myself. My first thought was, "If this is what women suffer day in and day out, I'm not ready for this." I had treated women for years, but only then did I truly understand the gravity of what they describe.
Why do hot flushes happen?
People think a hot flush means your body is too hot. It isn't. Deep in the brain, an area called the hypothalamus works like the thermostat of an air conditioner. It keeps body temperature within a comfortable band. When you get a little warm, it switches on sweating; when you get cold, it makes you shiver.
Estrogen helps keep a group of nerve cells in the hypothalamus, known as KNDy neurons, in check. As estrogen falls, these neurons become overactive and release more of a signalling chemical called neurokinin B. The result is that the comfortable band narrows. Imagine an AC set so sensitively that one degree of warmth makes it blast at full power. Now a very small rise in core temperature, from a hot cup of chai, a warm room or simple stress, is read as overheating. The brain responds as if you are in danger: blood vessels in the skin open up (the flush), you sweat, and your heart speeds up.
That is why I tell women: you are not "too hot". Your thermostat has become oversensitive. Newer non-hormonal medicines work by blocking neurokinin B at exactly this point.
How long do hot flushes last?
Longer than most women are told. The Study of Women's Health Across the Nation (SWAN) followed women through the menopause transition and found:
| Finding | Median duration |
|---|---|
| Total duration of frequent hot flushes | 7.4 years |
| Duration after the final period | 4.5 years |
| Women whose flushes began while still premenopausal or in early perimenopause | more than 11.8 years in total |
| Women whose flushes began after menopause | 3.4 years in total |
The same study found differences between ethnic groups, which reminds us that every woman's course is her own. The NHS similarly notes that menopause symptoms usually last 7 to 9 years, sometimes longer. Seven years of broken sleep and sweaty meetings is not something to just "adjust" to.
What actually helps hot flushes?
1. Menopausal hormone therapy (MHT). NICE recommends offering hormone therapy for hot flushes and night sweats after discussing short-term and longer-term benefits and risks. For women with a womb, estrogen is combined with a progestogen to protect the womb lining. Estrogen can be given as a tablet, patch, gel or spray. The Menopause Society's 2022 position statement says that for most healthy women with symptoms who are under 60 or within 10 years of menopause, the benefits outweigh the risks. It is always a prescription decision after assessment. See Menopausal hormone therapy explained.
2. Cognitive behavioural therapy (CBT) and clinical hypnosis. The Menopause Society's 2023 non-hormone position statement recommends both. CBT helps women experience flushes as less bothersome and cope better; clinical hypnosis has been shown to reduce how often and how severely flushes occur.
3. Non-hormonal prescription medicines. Options recommended by The Menopause Society include low doses of certain SSRI or SNRI antidepressants (used here for their effect on temperature control, not because you are depressed), gabapentin and oxybutynin. A newer class, neurokinin receptor blockers such as fezolinetant and elinzanetant, has been approved in the US. Each has its own side effects and suitability. NICE advises that SSRIs and SNRIs should not be routinely offered first-line for hot flushes alone, and that some should be avoided with tamoxifen. See Non-hormonal treatments for hot flushes.
4. Weight loss, where relevant. The Menopause Society lists weight loss as an option that may reduce hot flushes for some women.
What about cooling, food triggers and supplements?
Many women find these practical steps make flushes easier to live with:
- Cotton or linen clothing in layers you can remove, especially for office air-conditioning and outdoor heat
- A small handheld or USB fan, cool water to sip, a cool shower before bed
- Noting personal triggers such as alcohol, very hot drinks or spicy food, and adjusting if they clearly set you off
But I must be honest with you. The Menopause Society reviewed the evidence and found that cooling techniques, avoiding triggers, paced breathing, exercise, yoga, soy products and herbal supplements did not reliably reduce hot flushes in trials. They are fine for comfort and general health, but they are not a treatment you should feel you have "failed" at. It's not your fault if they didn't stop the flushes. NICE also notes that while some women find isoflavones or black cohosh helpful, product quality varies and safety is uncertain, and St John's wort can interact with other medicines, including tamoxifen.
When should you see a doctor about hot flushes?
- When flushes or sweats wake you at night or disturb work and family life
- When you are under 45, or under 40, and flushes start along with period changes
- If you have palpitations, which the NHS advises getting checked
- If flushes come with weight loss, fever, diarrhoea or a tremor, which may point to thyroid or other conditions
- If you have had breast cancer or are at high risk, to discuss safe non-hormonal options
How I approach this at Dr Tvacha
At Cocoon × Dr Tvacha in Thane West, I go through how often your flushes happen, how they affect your sleep and work, and your personal and family history before discussing hormonal or non-hormonal options. You leave with a clear plan and fixed review dates, and the choice remains yours. Read about the Right Stop Programme on our women's health page.
Frequently asked questions
Are hot flushes dangerous?
Hot flushes themselves are not dangerous, but they are not trivial either. Frequent flushes and night sweats disturb sleep, and that affects your mood, concentration and work. They are treatable, so please discuss them with your doctor instead of simply enduring them. Palpitations with flushes should also be checked, as the NHS advises.
Why are my hot flushes worse at night?
Night-time flushes, called night sweats, often feel worse because a warm bedroom, heavy blankets and a partner beside you all add heat, and because waking breaks your deep sleep, so you notice and remember each episode. Treating the flushes themselves usually improves sleep. Read more in our article on night sweats and waking at 3 am.
Is hormone therapy the only thing that really works?
No. Hormone therapy is the most effective treatment for many women, but it is not the only option with evidence. CBT, clinical hypnosis, some SSRI and SNRI medicines, gabapentin, oxybutynin and the newer neurokinin-blocking medicines all have trial support. The right choice depends on your health history, your preferences and your other medicines.
Do Indian spices or spicy food cause hot flushes?
Spicy food, very hot drinks and alcohol can set off a flush in some women, because they raise body temperature slightly. But they do not cause the underlying problem, which is a hormone-driven change in the brain's thermostat. The Menopause Society found that avoiding triggers did not reduce flushes overall in studies, though some women still find it helps.
Can I take hot flush treatment if I have had breast cancer?
Women with a history of breast cancer are generally advised against systemic hormone therapy and should be referred to a specialist. Non-hormonal options exist, but some antidepressants interfere with tamoxifen, so NICE advises against paroxetine and fluoxetine in women taking it. This decision should always be made with your oncologist and gynaecologist together.
Written by
Dr Anagha KarkhanisGynaecologist and Fertility Specialist · Reg. No. 2006/02/1187Leads midlife women's health at Cocoon × Dr Tvacha, Thane.
Sources
- Menopause: identification and management (NICE guideline NG23), recommendations
- The Menopause Society 2023 nonhormone therapy position statement, press release
- The Menopause Society 2022 hormone therapy position statement, press release
- Duration of menopausal vasomotor symptoms over the menopause transition (JAMA Internal Medicine, SWAN)
- Overview of KNDy neurons (Patient Care Online)
- Symptoms of menopause (NHS)
This article is for general education and does not replace a consultation. Medicines and treatments are prescribed only after a doctor's assessment. Last reviewed 25 October 2026.