Last checked September 2026 against 11 sources · Editorial policy
What does a hot flash feel like?
A hot flash feels like sudden heat rising through the chest, neck and face, often with red skin and enough sweat to soak you. Your heart may race, and you may feel anxious or a little dizzy. It usually lasts several minutes. When the sweat evaporates, chills or shivering are common. At night the same wave wakes you with drenched bedding, and a run of flashes can leave you wiped out.
Sudden heat rising through the chest, neck and face, flushing, sweating, a racing heart, then chills. What a hot flash feels like minute by minute.
What a hot flash feels like vs what people expect
What people often expect
“A hot flash is just feeling a bit warm”
What the evidence shows
It is a full heat-release response: flushing, sweating and a faster heartbeat, often with anxiety or dizziness. Between 50% and 75% of women have hot flashes or night sweats during the menopause transition, and frequent episodes last a median of 7.4 years. So the sensation is intense, and for many women it is a long-running part of midlife, not a passing warmth.
What happens in your body during a hot flash
Why a hot flash starts with sudden heat
Falling estrogen narrows the brain's comfort zone for body temperature, partly through overactive neurokinin B signaling in the hypothalamus. A small rise in core heat is read as overheating, and the brain triggers a fast heat-release response. That is why a flash seems to come out of nowhere: the trigger is a tiny internal change you'd never normally notice, not the room suddenly getting hotter.
Hot flashes in the face, neck and chest: why skin turns red
To shed heat fast, blood vessels in the skin widen, which is the visible flush: red, blotchy skin over the face, neck and upper chest. Many women feel a wave of heat rising from the chest upward. The NHS describes hot flashes as the face, neck and chest suddenly feeling very hot. Some women flush visibly; others feel the heat intensely without much change in color.
Sweating, a racing heart and anxiety during a hot flash
Sweat follows the flush, sometimes enough to soak your clothes. The heart speeds up to push blood to the skin, which you may feel as palpitations: racing, pounding or fluttering. The NHS lists palpitations, anxiety and dizziness as part of a hot flash. For some women the anxious feeling arrives a moment before the heat, which is why flashes are sometimes mistaken for panic.
Hot flashes then chills: why you go cold afterward
Each wave usually lasts several minutes. Afterward, cooling sweat on your skin can leave you shivery or chilled, sometimes enough to shake. The NHS notes that flushes can feel very hot or very cold. Some women mostly notice the cold part, which they call a cold flash. It's the same event: the body overshoots while getting rid of heat, then has to warm back up.
What a hot flash feels like at night
Night sweats are the same cascade after dark: you wake soaked even when the room is cool, often too hot to stay under the covers and then too cold without them. Lost sleep then feeds irritability, stress and daytime fatigue, which is why hot flashes rarely stay a daytime-only problem, and why treating them often improves rest.
Early hot flashes can feel milder and irregular
Hot flashes often begin in perimenopause while you still have periods, sometimes just a few around a period at first. Women whose flashes start this early tend to have them longest, a median of more than 11.8 years in SWAN. Early on they may feel like brief warmth or an unexplained flush, which is easy to dismiss until they become more frequent.
How common are hot flashes?
From the studies on this page
of women have hot flashes or night sweats during the transition
50–75%
Reported range across studies or subgroups
median total duration of frequent hot flashes
7.4 years
Bar scaled to a 12-year reference span
of women report hot flashes during or after the transition, according to a 2023 review
Up to 87%
Most women who get hot flashes describe the same core pattern of heat, sweat and chill, but intensity varies a lot, from a brief warm flush to drenching episodes several times an hour.
Feelings that can be mistaken for a hot flash
A hot flash has a typical shape: heat that rises and spreads, then sweat, then a chill. When the order or the extras are different, one of these may be the cause instead.
Panic attack
Check →Fear and a racing heart come first, with breathlessness, tingling or a sense of doom, not rising heat.
Test: Doctor or talk therapy
Heart palpitations
Check →A racing, pounding or fluttering heart without the wave of heat and sweat.
Test: Doctor; ECG if needed
Overactive thyroid
Check →Always warm rather than in waves, with weight loss, shaky hands and a fast heartbeat at rest.
Test: TSH blood test
Fever or infection
Chills and heat that come with feeling unwell, a cough, sore throat or a high temperature on a thermometer.
Test: Take your temperature; doctor if it persists
A medicine
Check →Flushing or sweating started after a new antidepressant, steroid or painkiller.
Test: Medicine review
What helps when a hot flash hits
HRT stops most hot flashes
Strong evidenceSystemic estrogen, alone or combined with a progestogen, reduces hot flash frequency by about 75%. Oral and transdermal estrogen have similar efficacy. NICE advises offering HRT for hot flashes, and The Menopause Society calls it the most effective treatment.
Related guide →Non-hormonal options for hot flashes
Strong evidenceFezolinetant, SSRIs, SNRIs, gabapentin, CBT and clinical hypnosis are all supported at the highest level of evidence when hormones aren't suitable or wanted. Non-hormonal medicines reduce hot flash frequency by about 40–65%. CBT and hypnosis make flashes less bothersome even when the number doesn't change much.
Related guide →What to do in the moment of a hot flash
First stepWear light layers you can take off, keep a fan and a cold drink nearby, and splash your face or wrists with cool water or take a cool shower. Slow your breathing if the racing heart makes you anxious. At night, keep the bedroom cool. These take the edge off each flash but don't reduce how often they come.
Cut hot flash triggers
First stepSpicy food, caffeine, hot drinks, smoking and alcohol can set off individual flashes, and stress makes them worse. Notice which ones affect you and cut those back. The Menopause Society's review found trigger avoidance doesn't lower the overall number of flashes, but many women find it makes particular situations, like dinners out, more manageable.
When hot flashes or chills need a doctor
Urgent: Racing heart with chest pain, breathlessness or fainting
Call 911 (999 in the UK). Don't drive yourself.
Heat with a fever, weight loss or constant sweating
See a doctor. Night sweats with fever, cough or unexplained weight loss need a workup that is separate from menopause.
Palpitations that keep coming back or last more than a few minutes
See a doctor, especially if you have a heart condition or family history of heart problems.
More →Hot flashes are wrecking your days or nights
See a doctor. You don't need to wait them out: HRT and non-hormonal medicines work.
What hot flashes feel like: questions women ask
What does a hot flash feel like?
Sudden heat that rises through the chest, neck and face, often with red skin, heavy sweating and a racing heart. Some women feel anxious or dizzy. It lasts several minutes and can end with chills as the sweat evaporates.
How long does a hot flash usually last?
Each episode often lasts several minutes. Over the years, women with frequent hot flashes have them for a median of 7.4 years in total, and 4.5 years after the final period.
Related →Can a hot flash feel cold?
Yes. The NHS notes that flushes can feel very hot or very cold. Some women shiver once the sweat evaporates, and some feel mainly chilled rather than hot, which they call a cold flash. It's the same event, with the body overshooting as it sheds heat.
Why do I get chills after a hot flash?
The flash dumps heat by widening skin blood vessels and making you sweat. When the sweat evaporates, you lose more heat than you needed to and feel cold or shivery. It passes as your body warms back up. Chills with a fever or feeling unwell are a different thing and point to an infection.
Why does my heart race during a hot flash?
Speeding up the heart is part of how the body releases heat when blood vessels widen. Palpitations and anxiety are common during flushes. If your heart races with chest pain, breathlessness or fainting, call 911.
Why do hot flashes make my face red?
Blood vessels in the skin widen to release heat, so the face, neck and upper chest flush red and blotchy. It fades as the flash passes, usually within several minutes. The redness is harmless, but if it bothers you, treating the flashes reduces it.
Can hot flashes make you shake?
Yes. Shaking or shivering after a flash is common as the sweat cools you down. Shaking that comes with heat all the time, weight loss and a fast heartbeat at rest could be an overactive thyroid, which a TSH blood test checks.
What's the difference between a hot flash and a fever?
A hot flash comes in a wave, lasts several minutes and passes, and your thermometer reading stays normal. A fever lasts hours, comes with feeling unwell and shows a raised temperature. Sweats with a fever, cough or weight loss need a doctor.
Sources
- NHS. Symptoms of menopause and perimenopause.
- NHS. Night sweats.
- Crandall CJ, Mehta JM, Manson JE. Management of Menopausal Symptoms: A Review. JAMA. 2023;329(5):405-420.
- Avis NE, Crawford SL, Greendale G, et al. Duration of menopausal vasomotor symptoms over the menopause transition. JAMA Intern Med. 2015;175(4):531-9.
- Conklin M, Santoro N. Neurokinin receptor antagonists as potential non-hormonal treatments for vasomotor symptoms of menopause. Ther Adv Reprod Health. 2023;17:26334941231177611.
- NHS. Heart palpitations.
- Kravitz HM, Zhao X, Bromberger JT, et al. Sleep disturbance during the menopausal transition in a multi-ethnic community sample of women. Sleep. 2008;31(7):979-90.
- NICE. Menopause: identification and management (NG23). Updated 2024.
- The North American Menopause Society. The 2023 nonhormone therapy position statement of The North American Menopause Society. Menopause. 2023;30(6):573-590.
- NHS. Things you can do to help menopause and perimenopause symptoms.
- National 911 Program. 911.gov.
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