Hot Flashes in Menopause: Causes, Triggers and Treatments That Work

Hot flashes are sudden waves of heat, usually across the face, neck and chest, often with flushing, sweating and a racing heart. They affect up to 80% of women during the menopause transition and typically last a few minutes. For many, they continue for seven years or more. Hormone therapy, newer non-hormonal medicines and CBT can all help.

What does a hot flash feel like?

A hot flash usually starts as a sudden feeling of heat in the chest, neck or face that spreads upward. You might notice:

• Red, flushed skin
• Sweating, sometimes heavy
• A faster or pounding heartbeat
• Anxiety or a sense of unease just before or during the flash
• Chills afterward as your body cools down

Most last between one and five minutes. Some people have an occasional mild warmth; others have many intense episodes a day. When they happen during sleep, they're called night sweats.

Why does menopause cause hot flashes?

Hot flashes are a "vasomotor" symptom, meaning they involve the widening and narrowing of blood vessels. Falling and fluctuating estrogen affects the hypothalamus, the part of the brain that controls body temperature.

As estrogen drops, the brain's comfortable temperature range appears to narrow. A small rise in core temperature can then trigger the body's cooling response: blood vessels in the skin widen, you flush and sweat, and your heart rate rises. Newer medicines work by calming the brain cells involved in this pathway.

How common are hot flashes, and how long do they last?

Up to 80% of women experience hot flashes during the menopause transition. In the Study of Women's Health Across the Nation (SWAN), women with frequent hot flashes had them for a median of 7.4 years in total, including a median of 4.5 years after their final period.

Duration varies:

• African American women had the longest median duration, at 10.1 years.
• Starting earlier in the transition was linked with longer duration.
• Higher stress, anxiety or depressive symptoms at the start were linked with longer duration.

The NHS notes that women from a Black ethnic background are more likely to have hot flashes that are severe and last longer. A review of international studies found women in East and Southeast Asia generally report hot flashes less often. See how long menopause symptoms last.

What else can cause hot flashes?

Not every hot flash is menopause. Other causes include:

• An overactive thyroid, which Mayo Clinic notes can cause hot flashes, palpitations, anxiety and insomnia in women of menopausal age
• Medicines, including some antidepressants and treatments for breast or prostate cancer
• Infections, particularly if you have a fever
• Anxiety or panic attacks
• Alcohol, especially in people sensitive to it
• Rarely, other hormone-producing conditions

See perimenopause or something else.

What triggers hot flashes?

Triggers vary from person to person. Commonly reported ones include:

• Heat: warm rooms, hot weather, hot baths
• Hot drinks and spicy food
• Alcohol and caffeine
• Smoking, which is linked with worse hot flashes
• Stress, anxiety or embarrassment
• Tight or heavy clothing

A simple trigger diary for two or three weeks can reveal patterns. Remember that avoiding triggers may reduce hot flashes, but it rarely stops them completely. Our private Symptom Explorer can help you track them.

What will a clinician assess?

A clinician may ask about:

• How often your hot flashes happen, how severe they are, and how they affect sleep, work and mood
• Changes in your periods and your age
• Your medicines and any other symptoms, such as weight loss or palpitations
• Your personal and family medical history, which affects treatment choices

For people over 45 with typical symptoms, NICE advises that no blood tests are needed to identify perimenopause or menopause. Tests may be used to check other causes, such as thyroid problems.

What treatments work for hot flashes?

Hormone therapy (HRT)

The Menopause Society describes hormone therapy as the most effective treatment for hot flashes. NICE recommends offering HRT for hot flashes linked to menopause, after discussing the benefits and risks.

• Who it suits best: Hormone therapy's benefit-risk balance is generally favorable for people under 60 or within 10 years of menopause who have no contraindications.
• What it involves: People with a womb need estrogen plus a progestogen; people who have had a hysterectomy usually need estrogen only.
• Choice of route: Skin-applied estrogen, such as patches, gels and sprays, isn't associated with the increased stroke risk seen with tablets.

Menopause-specific cognitive behavioral therapy (CBT)

NICE recommends considering menopause-specific CBT for hot flashes, alongside HRT or as an alternative. The evidence shows its biggest effect is on how much hot flashes bother people, and it can also reduce their frequency and severity. It's available face to face, online, in groups or as self-help.

Non-hormonal medicines

• Fezolinetant targets the brain's temperature-control pathway. NICE recommends it for moderate to severe hot flashes when HRT is unsuitable.
• Elinzanetant works on a similar pathway. The FDA approved it in October 2025, following approvals in the UK, Canada, Australia and Switzerland.
• Some antidepressants (SSRIs and SNRIs), gabapentin and clonidine can reduce hot flashes. NICE advises against offering SSRIs, SNRIs or clonidine routinely as first-line treatment for hot flashes alone. Some SSRIs should not be taken with tamoxifen.

Supplements

NICE notes some evidence that isoflavones or black cohosh may relieve hot flashes. However, preparations vary, their safety is uncertain, and interactions with other medicines have been reported. If you've had breast cancer, NICE advises caution with St John's wort because of serious interactions, including with tamoxifen.

Treatment options at a glance

This table is a general guide, not a recommendation for any individual.

Practical steps that may help

• Dress in layers you can remove quickly, in breathable fabrics.
• Keep cool: a fan at your desk, a cool drink, and a cooler bedroom.
• Notice and reduce your triggers, such as alcohol, caffeine or spicy food.
• Stop smoking.
• Try slow, calm breathing when you feel a flash starting. It can help you feel more in control.
• Stay active, for your general health, mood and sleep.
• Tell people. Colleagues and family can help, for example by adjusting room temperature.

When should you see a doctor?

Book an appointment if:

• Hot flashes are affecting your sleep, work, mood or daily life
• You are under 45, especially under 40
• You'd like to discuss treatment
• Your hot flashes don't fit the usual pattern, for example they started suddenly with other new symptoms

Seek prompt medical advice if hot flashes come with:

• Fever, unexplained weight loss or swollen glands
• Palpitations with chest pain, fainting or breathlessness
• Diarrhea, tremor or weight loss, which can suggest an overactive thyroid

Seek emergency care for chest pain, severe breathlessness or fainting.

SWAN research has also linked frequent or persistent hot flashes with higher later cardiovascular risk. It's a good reason to check your blood pressure and cholesterol. See heart health after menopause.

Questions to ask at your appointment

1. Do my hot flashes fit with menopause, or should anything else be checked?
2. Is hormone therapy suitable for me, and which type and route?
3. What non-hormonal options are available to me, including fezolinetant or elinzanetant?
4. Can I access menopause-specific CBT?
5. Should my heart health be checked?

See your first menopause appointment for more.

Related symptoms

Night sweats · Sleep problems · Heart palpitations · Anxiety

For the bigger picture, see what perimenopause is and what menopause is.

Frequently asked questions

How long does a single hot flash last?

Usually one to five minutes, though some people have longer episodes.

Can hot flashes happen without sweating?

Yes. Some episodes mainly cause internal heat or facial flushing without much sweating.

Are hot flashes dangerous?

They aren't usually dangerous in themselves, but they can seriously affect quality of life. Research links frequent hot flashes with higher heart disease risk, so it's worth keeping an eye on heart health.

Can you get hot flashes before your periods stop?

Yes. They often begin during perimenopause, while periods are still happening.

What is the fastest way to stop a hot flash?

Cooling down quickly helps. Remove a layer, use a fan and sip a cold drink. Slow breathing may help you feel calmer. For frequent hot flashes, treatment is more effective than in-the-moment measures.

References

1. NICE guideline NG23: Menopause, identification and management (2024 update, via NCBI Bookshelf)
2. NICE NG23 recommendations (fezolinetant recommendation)
3. Avis NE et al. Duration of menopausal vasomotor symptoms. JAMA Internal Medicine, 2015
4. ScienceDaily: Hot flashes, night sweats last seven or more years (SWAN)
5. NHS: Symptoms of menopause and perimenopause
6. Menopause-associated depression (review, including cross-country symptom differences)
7. Mayo Clinic Press: Menopause symptoms? It could be a copycat
8. The 2022 hormone therapy position statement of The North American Menopause Society
9. Drugs.com: Lynkuet (elinzanetant) FDA approval history and mechanism
10. Bayer: Lynkuet (elinzanetant) US approval
11. Thurston RC et al. Vasomotor symptoms and cardiovascular events in SWAN. Journal of the American Heart Association
12. Pathfields Medical Group (NHS): Menopause information pack (smoking and hot flashes)

Editorial status: evidence-based educational article. Last evidence check: September 10, 2026.