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Hot flashes and night sweats are among the most common symptoms of perimenopause and menopause. Caused by changing hormone levels, they can range from mild warmth to intense episodes of sweating that disrupt daily activities, sleep, and overall quality of life. Understanding why they occur is the first step toward finding effective ways to manage them.
Hot flashes vary widely in frequency and severity from person to person.
Although related, hot flashes, cold flashes, and night sweats can feel quite different. Recognizing these symptoms can help you better understand what's happening in your body during menopause.
Symptoms vary from person to person. Some women experience only occasional warmth, while others have frequent episodes that interfere with daily activities or sleep.
If hot flashes or night sweats regularly interfere with sleep, work, or daily activities, speak with your healthcare provider about treatment options.



Hot flashes are one of the most common and recognizable symptoms of menopause. More than 80% of women experience them during the menopause transition or after menopause, although the frequency, severity, and duration can vary considerably from person to person.
Also known as vasomotor symptoms, hot flashes are sudden episodes of intense warmth that typically begin in the chest, neck, or face before spreading throughout the upper body. They are often accompanied by sweating, flushing, or a rapid heartbeat, and may be followed by chills or shivering as the body cools. Some women also notice red blotches on the chest, neck, or arms. More severe episodes can disrupt daily activities, interfere with sleep, and affect overall quality of life.
Cold flashes are less common and involve a sudden sensation of chills or shivering, sometimes occurring immediately after a hot flash as the body cools.
Night sweats (also called nocturnal hyperhidrosis) are hot flashes that occur during sleep. They affect up to 75% of women during perimenopause and menopause and are a common cause of disrupted sleep, fatigue, and reduced daytime concentration.
Although hot flashes have been studied for decades, researchers are still working to fully understand exactly why they occur. Current evidence suggests they result from a combination of hormonal changes and the way the brain regulates body temperature.
The hypothalamus, the part of the brain that acts as the body's thermostat, becomes more sensitive as estrogen levels decline during perimenopause and menopause. As a result, even small changes in body temperature can trigger the body's cooling response, leading to sudden feelings of heat, flushing, sweating, and, as the body cools, chills or shivering.
As estrogen levels decline during menopause, the hypothalamus becomes more sensitive to minor temperature changes. This narrows the body's normal "comfort zone" for temperature regulation, causing the brain to mistakenly think the body is overheating. Blood vessels widen (vasodilation), heart rate may increase, and sweating begins to cool the body, resulting in a hot flash.
Stress does not cause menopause, but it can trigger or worsen hot flashes and night sweats in some women. Stress activates the body's stress response and increases cortisol levels, which may influence body temperature regulation and make hot flashes feel more intense or occur more frequently.
While menopause is the most common cause of hot flashes, other factors can contribute or trigger similar symptoms. Certain medications, thyroid disorders, infections, some cancers or cancer treatments, and lifestyle factors such as alcohol, spicy foods, caffeine, or hot environments may also increase the likelihood of experiencing hot flashes. If symptoms begin suddenly, become unusually severe, or continue long after menopause, speak with your healthcare provider to rule out other possible causes.
One of the leading theories is that hot flashes begin in the hypothalamus, the part of the brain that acts as your body's thermostat. As estrogen levels decline during perimenopause and menopause, the hypothalamus becomes more sensitive to even small changes in body temperature. It can mistakenly interpret a slight rise in temperature as overheating, even when your body temperature is normal.
To cool the body, the brain quickly activates several natural responses:
As your body cools, you may then experience chills or shivering while your temperature returns to normal.
This rapid sequence of heat, sweating, cooling, and chills creates the familiar cycle experienced during a hot flash.
Hot flashes are usually related to menopause, but speak with your healthcare provider if:
Although hot flashes are caused by hormonal changes during menopause, many women notice that certain situations, foods, or lifestyle factors can trigger an episode or make symptoms feel more intense. Identifying your personal triggers may help reduce the frequency or severity of hot flashes.
Common triggers include:
Hot weather, saunas, hot baths, heated rooms, or using heating devices can raise body temperature and trigger a hot flash.
Emotional stress activates the body's stress response and may make hot flashes and night sweats more frequent or more intense.
These can temporarily increase body temperature and trigger symptoms in some women.
These may worsen hot flashes in some women, although individual responses vary.
Smoking has been linked to more frequent and severe hot flashes and may also contribute to an earlier onset of menopause.
Products containing stimulants, including some weight-loss supplements and medications, can increase body temperature or heart rate and may trigger hot flashes.
Tip: Keeping a symptom diary can help you identify personal triggers. Recording when hot flashes occur, along with foods, activities, stress levels, and environmental conditions, may help you recognize patterns and make practical lifestyle adjustments.

Although no single food or supplement can eliminate hot flashes, some dietary approaches may help reduce symptoms in certain women. Individual responses vary, and supplements should be discussed with your healthcare provider, particularly if you have other medical conditions or take prescription medications.
Omega-3 Fatty Acids
Some studies suggest omega-3 fatty acids may help reduce the frequency or severity of hot flashes, although results have been mixed.
Good food sources include:
Phytoestrogens
Phytoestrogens are naturally occurring plant compounds that have weak estrogen-like activity and may help relieve mild menopause symptoms in some women.
Common sources include:
Isoflavones: Soybeans, Tofu, Tempeh, Edamame
Lignans: Flaxseeds, Sesame seeds, Whole grains
Coumestans: Alfalfa sprouts, Broccoli, Brussels sprouts
Herbs and Botanicals
Some women choose herbal supplements, although scientific evidence supporting their effectiveness varies.
Examples include:
Note: Individual responses to dietary changes and supplements can vary. Discuss supplements with your healthcare provider before starting them, especially if you have other medical conditions or take prescription medications.

Menopausal hormone therapy (MHT) remains the most effective treatment for moderate to severe hot flashes and night sweats.
It works by replacing some of the estrogen that declines during menopause, helping to stabilize the body's temperature regulation.
Treatment may include:
Women who still have a uterus usually also require a progestogen to protect the lining of the uterus.
Like all medications, hormone therapy has potential benefits and risks. These vary according to age, medical history, and the type of hormone therapy used. Treatment should be reviewed regularly with your healthcare provider to ensure it remains appropriate.

Several non-hormonal medications are available for women who cannot or choose not to use hormone therapy.
Examples include:
Fezolinetant (Veozah®)
A neurokinin 3 receptor antagonist approved to reduce moderate to severe vasomotor symptoms associated with menopause.
Paroxetine (Brisdelle®)
A low-dose SSRI approved for the treatment of moderate to severe hot flashes.
Other prescription medications:
Depending on your medical history, your healthcare provider may also recommend other medications used off-label to help reduce hot flashes.
Cognitive behavioral therapy (CBT) or clinical hypnosis, have also been shown to help some women manage symptoms

Healthy lifestyle habits cannot stop menopause, but they may help reduce symptom severity and improve overall wellbeing.
Helpful strategies include:
Hot flashes and night sweats are among the most common symptoms of the menopause transition and can vary widely in frequency and severity. Understanding what triggers your symptoms, making practical lifestyle adjustments, and discussing treatment options with your healthcare provider can help many women find meaningful relief and improve their quality of life.
✓ Hot flashes and night sweats are among the most common symptoms of the menopause transition.
✓ Symptoms vary widely in frequency, duration, and severity.
✓ Hormonal changes are the primary cause, but lifestyle and environmental factors can influence symptoms.
✓ Hormone therapy is the most effective treatment for many women, while non-hormonal options and lifestyle changes may also provide relief.
✓ If symptoms are severe or affecting your quality of life, speak with your healthcare provider.

Looking for a more in-depth guide? Explore
Menopause Spotlight: Your Essential Guide to Perimenopause, Menopause, and Beyond.
Available in paperback, hardcover and ebook.
This website provides general information to help you better understand menopause and related topics, as explored in the Menopause Spotlight books. It is not medical advice and should not replace guidance from a qualified healthcare professional. Always consult your doctor or other healthcare provider with any questions about your health, treatments, or symptoms.