Most women don’t get a warning before perimenopause starts. One month, your cycle is predictable; the next, it’s not, and neither is your mood, your sleep, or your body temperature. What’s actually happening, and what can you do about it?
Here’s everything worth knowing, organised by stage, symptom, and what the evidence actually supports.
What Is Menopause
Menopause is when a woman experiences 12 consecutive months without a menstrual period, caused by the natural decline of oestrogen and progesterone production in the ovaries. It marks the end of reproductive years, though the broader hormonal transition spans years before and after that single point in time.
The National Health Service (NHS) puts the average age of menopause in the UK at 51, though it commonly occurs anywhere between 45 and 55. Starting before 40 is classified as premature menopause and warrants a separate conversation with a GP.
The Three Stages of Menopause
One of the most useful things to understand about menopause is that it isn’t a single event. The hormonal changes play out across distinct stages, each with its own timeline and health implications. Understanding those stages makes it easier to recognise what’s happening and when it’s worth seeking support.
Perimenopause
Perimenopause is the transition period, often beginning 8 to 10 years before menopause, typically in a woman’s 40s. Oestrogen levels don’t decline in a straight line during this phase; they fluctuate, which explains why signs of menopause like hot flushes and mood shifts can feel so erratic. Periods become irregular, sometimes heavier, sometimes lighter, sometimes arriving weeks apart.
Menopause
Menopause itself is technically one moment in time: 12 months after your final period. Most women don’t know they’ve reached it until they’re looking back from postmenopause.
Postmenopause
Postmenopause covers all the years that follow. For many women, vasomotor symptoms (hot flushes and night sweats) ease off over time. The longer-term health considerations, particularly bone density loss and cardiovascular risk linked to sustained low oestrogen, become the focus at this stage.
Signs of Menopause
Menopause symptoms vary widely in both type and severity. Some women move through the transition with minimal disruption, while others find it affects work, relationships, and daily quality of life in ways they didn’t anticipate. Neither experience is unusual, and the range of what counts as “normal” is far broader than most women are told.
Below are the main symptoms and what’s driving them:
Vasomotor Symptoms
Hot flushes and night sweats are the most widely recognised vasomotor signs of menopause. A hot flush is a sudden wave of heat, typically across the face, neck and chest, often followed by sweating and a quick chill afterwards. Night sweats are the same mechanism occurring during sleep. They can be mild and infrequent, or intense enough to require a change of clothes at 2 am.
Based on research, around 80% of women experience vasomotor symptoms at some point during the menopause transition. For roughly a third of those, symptoms are severe enough to interfere with sleep and daily functioning.
Genitourinary Symptoms
Genitourinary symptoms are among the least discussed signs of menopause, partly because many women don’t raise them with their GP, and partly because they’re often framed as a minor inconvenience rather than a treatable condition.
Low oestrogen causes vaginal tissue to thin and lose lubrication, leading to discomfort during intercourse (dyspareunia), increased urinary urgency, and a greater likelihood of recurrent urinary tract infections. Unlike hot flushes, genitourinary symptoms don’t improve on their own over time without treatment. They tend to worsen, and that is worth knowing early.
Sleep, Mood, and Cognitive Symptoms
Sleep disruption during perimenopause and menopause has multiple causes, and night sweats are only part of it. Oestrogen plays a direct role in the sleep cycle, so even women without significant vasomotor symptoms can find that their sleep quality deteriorates. Once sleep is disturbed consistently, mood, memory, and concentration follow.
Mood changes during menopause can range from irritability and anxiety to low mood that clinically resembles depression. These aren’t purely a downstream effect of poor sleep. Oestrogen and progesterone act directly on neurotransmitter systems, including serotonin and GABA, both of which regulate mood and stress response. Women who experienced significant premenstrual mood changes are generally more likely to experience mood symptoms during the menopause transition.
“Brain fog” (the difficulty concentrating or retaining information that many women describe) is a real and widely reported symptom. It’s also one of the most distressing, partly because it tends to arrive without explanation and is easily misattributed to stress or age.
Physical Changes
The physical side of menopause extends well beyond vasomotor symptoms, and these changes are often the ones women feel least prepared for.
Weight redistribution, particularly around the abdomen, is a direct metabolic response to declining oestrogen. It’s not simply about lifestyle changes or calorie intake. Hair thinning, dry skin, and joint pain are also consistently reported across perimenopause and postmenopause. These symptoms receive far less attention than hot flushes, but they can be equally disruptive to confidence and daily comfort.
Managing Menopause Symptoms
Managing menopause symptoms effectively starts with knowing that more options exist now than most women are aware of, and that the right approach is rarely one-size-fits-all.
Whether you’re considering hormonal and non-hormonal clinical options or exploring supplementation and lifestyle strategies, below are some of the widely available support systems at each level:
Menopause Hormone Therapy (MHT/HRT)
Hormone therapy works by replacing the oestrogen (and, where needed, progesterone) that the body stops producing. It’s the most effective treatment available for vasomotor symptoms, and evidence supports its benefits for sleep quality, low mood, genitourinary symptoms, and longer-term bone health.
Body-identical hormones, those with the same molecular structure as the body’s own hormones, are now standard in NHS prescribing. Women who have a uterus require progesterone alongside oestrogen to protect the uterine lining, while women who’ve had a hysterectomy are typically prescribed oestrogen alone.
Vaginal Estrogen for Genitourinary Symptoms
For genitourinary symptoms specifically, low-dose vaginal oestrogen carries a different risk profile from systemic HRT and is considered very safe for the vast majority of women, including many who can’t use systemic hormone therapy. It’s available as a cream, pessary or ring, and current evidence supports long-term use.
Women already taking systemic HRT may still need vaginal oestrogen separately. The systemic dose reaching vaginal tissue is often insufficient to address localised dryness and urinary symptoms on its own.
Lifestyle and Non-Hormonal Options
Not every woman wants or is suited to hormone therapy, and there are evidence-backed non-hormonal approaches worth knowing about.
Strength Training
Strength training is particularly relevant during postmenopause, where bone density loss accelerates without oestrogen’s protective effect. Aerobic exercise supports cardiovascular health and, for some women, reduces hot flush frequency. Dietary adjustments (such as limiting alcohol, caffeine, and known personal triggers) can help manage vasomotor symptoms, though individual responses vary.
Cognitive Behavioural Therapy
Cognitive Behavioural Therapy (CBT) has a solid evidence base for managing sleep disruption and mood symptoms. NICE includes it in its guidance as a non-hormonal option for women who prefer not to use hormone therapy or for whom it’s contraindicated. Magnesium is commonly used to support sleep quality during menopause and perimenopause. For women where hormonal treatment is insufficient or unsuitable, non-hormonal prescription medications (including certain antidepressants and neurokinin receptor antagonists) can reduce vasomotor frequency with reasonable effectiveness.
NHS Menopause Assessment
As part of the updated NHS health check guidance for women aged 40 to 70, menopause assessments are being built into routine care. The aim is earlier identification and support, reaching women during perimenopause rather than waiting until symptoms have already caused significant disruption to work, relationships, and wellbeing.
When to Speak to a GP About Menopause
If you’re in your 40s and noticing irregular periods alongside any of the symptoms described above, raising it with your GP is worthwhile rather than waiting. Perimenopause can generally be identified through symptom history alone in women over 45. A Follicle-stimulating hormone (FSH) blood test may be used in some cases, though FSH fluctuates during perimenopause, and a single reading isn’t always a reliable indicator.
Women in their 40s are regularly misdiagnosed with anxiety or depression before a hormonal cause is considered. If that happens, asking specifically about perimenopause is a reasonable and appropriate step.
Menopause is one of the few health transitions that every woman will go through, yet it remains one of the most under-supported. Many women spend years attributing their symptoms to stress, ageing, or mental health conditions before a hormonal cause is ever considered. That delay has a real cost, to careers, relationships, and physical health outcomes that could have been addressed earlier.
Nutritional support, targeted women’s supplementation, and lifestyle strategies all have a role alongside medical care. And if you’re unsure where to start, speaking to a qualified nutritional practitioner alongside your GP can give you a fuller picture of what your body needs right now.