If you’ve ever found yourself suddenly feeling overwhelmingly hot, flushing from your chest to your face, throwing the duvet off in the middle of the night, or desperately searching for a fan while everyone else seems perfectly comfortable, you’re certainly not alone.
Hot flushes in perimenopause and night sweats in perimenopause are among the most common symptoms women experience during midlife. Yet despite how common they are, they can have a significant impact on quality of life.
They can disrupt sleep, affect confidence, trigger anxiety, leave you feeling exhausted, and make everyday activities feel more challenging.
Most women are told that hot flushes happen because oestrogen levels decline. While this is partly true, the reality is much more nuanced.
Hormones are an important piece of the puzzle, but they’re not the whole story.
Understanding the wider factors involved can be incredibly empowering because it highlights areas where lifestyle changes and targeted support may help reduce symptom severity.
What Causes Hot Flushes in Perimenopause?
To understand what causes hot flushes in perimenopause, we need to look at the relationship between oestrogen and the brain.
One of the key areas involved is the hypothalamus, a small but incredibly important region of the brain responsible for regulating body temperature, appetite, sleep, hormones, and many other essential functions.
As oestrogen levels begin to fluctuate and decline during perimenopause, the hypothalamus becomes more sensitive to small changes in body temperature.
Researchers believe that this narrows what is known as the “thermoneutral zone” – the temperature range within which the body feels comfortable.
As a result, even tiny increases in temperature can trigger the body’s cooling mechanisms.
The body responds by:
- Dilating blood vessels near the skin
- Increasing blood flow to the surface
- Triggering sweating
This creates the sensation of a hot flush.
Why Hot Flushes and Night Sweats in Perimenopause Are About More Than Hormones
Hot flushes and night sweats are often referred to as vasomotor symptoms.
The term “vasomotor” refers to changes in blood vessel function and blood flow.
This is important because it reminds us that hot flushes are not solely a hormone issue. They also involve the nervous system, blood vessels, and cardiovascular system.
In recent years, researchers have become increasingly interested in the relationship between vasomotor symptoms and cardiovascular health.
While experiencing hot flushes does not mean you have heart disease, it does highlight the close connection between hormonal changes, blood vessel function, and overall metabolic health.
The Blood Sugar Connection: An Overlooked Cause of Hot Flushes
One of the most overlooked contributors to hot flushes in perimenopause is blood sugar instability.
When blood sugar drops too quickly, the body needs to bring it back up to a safe level.
To do this, it releases stress hormones such as adrenaline and cortisol.
These hormones can trigger physical sensations that feel very similar to a hot flush, including:
- Sudden warmth
- Sweating
- A racing heart
- Feelings of anxiety
- Restlessness
This is one reason why some women notice that their hot flushes or night sweats are worse:
- Late in the afternoon
- During the night
- After skipping meals
- Following alcohol consumption
- During periods of chronic stress
Supporting blood sugar balance through regular meals, adequate protein, fibre-rich carbohydrates, and healthy fats can make a surprisingly meaningful difference for some women.
Why Stress Can Worsen Hot Flushes and Night Sweats
Many women enter perimenopause during one of the busiest and most demanding stages of life.
At the same time as hormones are fluctuating, women are often juggling:
- Careers
- Family responsibilities
- Teenagers or younger children
- Ageing parents
- Financial pressures
- Sleep disruption
The nervous system can become stuck in a chronic state of stress and hypervigilance.
When stress hormones such as cortisol and adrenaline remain elevated for prolonged periods, they can increase nervous system sensitivity and worsen vasomotor symptoms.
This is one reason why stress management is not simply about relaxation or self-care.
Supporting the nervous system is a genuine physiological strategy that may help reduce hot flushes naturally and improve resilience during perimenopause.
Alcohol and Night Sweats in Perimenopause
Many women notice a clear relationship between alcohol consumption and night sweats in perimenopause.
Alcohol can:
- Dilate blood vessels
- Disrupt sleep quality
- Increase body temperature
- Trigger blood sugar fluctuations
- Place additional demands on the liver
Even small amounts of alcohol can be enough to worsen symptoms in some women.
If hot flushes or night sweats are particularly troublesome, it can be useful to experiment with reducing alcohol intake and observing whether symptoms improve.
Don’t Overlook Hydration and Electrolytes
Hydration is another factor that rarely gets discussed when talking about how to reduce hot flushes naturally.
Women experiencing frequent sweating may lose more fluids and electrolytes than they realise.
Dehydration can place additional stress on the body and potentially worsen symptoms such as:
- Fatigue
- Headaches
- Dizziness
- Poor concentration
Ensuring adequate fluid intake throughout the day and considering electrolyte support when appropriate may be beneficial, particularly during warmer weather or periods of increased sweating.
How to Reduce Hot Flushes Naturally: Start With the Foundations
When symptoms become disruptive, it’s natural to start looking for supplements.
However, before spending money on supplements, it’s important to ensure the foundations are in place.
This includes:
- Regular meals
- Adequate protein intake
- Stable blood sugar regulation
- Stress management
- Good sleep habits
- Physical activity
- Hydration
These factors create the environment in which hormones and the nervous system can function more effectively.
Do Supplements for Hot Flushes Work?
There are several supplements commonly used to help reduce hot flushes naturally and support women experiencing night sweats in perimenopause.
While they are not magic solutions, some women find them helpful.
Black Cohosh
Black cohosh is one of the most widely researched herbal remedies for hot flushes.
Some studies suggest it may help reduce the frequency and severity of symptoms, although results are mixed and responses vary between individuals.
Sage
Sage has traditionally been used to help manage excessive sweating and mild vasomotor symptoms.
Many women use sage tea or sage supplements as part of their symptom-management approach.
Red Clover
Red clover contains naturally occurring plant compounds called isoflavones, which have mild phytoestrogenic properties.
Some women report improvements in symptoms, although the effects are generally modest and should not be considered equivalent to HRT.
ERr 731® (Siberian Rhubarb Extract)
ERr 731® is a standardised extract derived from Siberian rhubarb.
Several clinical studies have demonstrated improvements in menopausal symptoms and quality of life, making it one of the more promising evidence-based options available.
Hot Flushes in Perimenopause: The Takeaway
If you’re experiencing hot flushes in perimenopause or struggling with night sweats, it’s important to remember that hormones are only one piece of the puzzle.
Your nervous system, blood sugar regulation, stress levels, hydration status, alcohol intake, cardiovascular health, and overall lifestyle habits can all influence how frequently symptoms occur and how intense they feel.
Understanding what causes hot flushes and identifying your own personal triggers can give you more options, more agency, and more opportunities to support your body.
Because your symptoms are not random.
Your body is responding to a combination of hormonal, neurological, vascular, metabolic, and lifestyle factors.
And often, small consistent changes can make a meaningful difference.
Where would you like to go next?
If this resonated with you, there are a few ways we can continue the conversation.
Listen to the podcast
This article is based on Episode 89 of the Empowered Perimenopause Podcast, where I explore the bigger picture behind hot flushes and night sweats.
Listen to the episode here.
Free quiz: Start making sense of your symptoms
If you’re wondering whether what you’re experiencing could be related to perimenopause, my free Perimenopause Quiz is a great place to begin.
In just a few minutes, you’ll gain a better understanding of where you are in your perimenopause journey, along with personalised guidance to help you take your next steps with confidence.
Take the free Perimenopause Quiz here.
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