Menopause & Perimenopause
Symptoms, Causes & Treatment
Everything you need to know about menopause and perimenopause: what to expect, how to recognise the transition, and the highly effective treatments including HRT that can transform quality of life.
What Is Menopause?
Menopause is defined as the point at which a woman has not had a menstrual period for 12 consecutive months, marking the permanent end of reproductive fertility. In the UK, the average age of menopause is 51, though it can occur naturally at any age between 45 and 55. Menopause before the age of 40 is classified as premature ovarian insufficiency (POI) and affects approximately 1 in 100 women.
Perimenopause is the transitional phase leading up to menopause, during which hormone levels (particularly oestrogen) begin to fluctuate and decline. Perimenopause can begin several years before the final period -- often in the mid-40s, but sometimes earlier -- and is the stage during which most women first notice symptoms. The average duration of perimenopausal symptoms is around four years, but for some women, symptoms persist for a decade or longer.
Both perimenopause and menopause are natural biological processes, not diseases. However, the hormonal changes they involve can produce a wide range of physical and psychological symptoms that significantly affect quality of life, work, relationships, and mental health. Effective treatments are available, and no woman should feel she simply has to endure debilitating symptoms.
An estimated 13 million women in the UK are currently perimenopausal or postmenopausal. Despite this, menopause remains underdiagnosed and undertreated, with many women either not recognising their symptoms as menopause-related or not being offered appropriate treatment.
What Are the Symptoms of Menopause & Perimenopause?
Menopausal symptoms are wide-ranging and highly individual. Up to 80% of women experience symptoms during perimenopause; around 25% experience severe symptoms that significantly affect quality of life.
Hot flushes and night sweats · Irregular or stopped periods (perimenopause) · Vaginal dryness and discomfort during sex · Mood changes, low mood, and irritability · Brain fog and poor concentration · Sleep disturbance · Reduced libido · Joint aches and muscle pains · Urinary symptoms (urgency, recurrent UTIs) · Changes in skin, hair, and body shape
Unexpected heavy vaginal bleeding after periods have stopped (postmenopausal bleeding) — requires urgent investigation to exclude endometrial cancer · Suicidal thoughts or severe depression during perimenopause · Severe cardiovascular symptoms in women with premature ovarian insufficiency (POI)
Any vaginal bleeding more than 12 months after your last period (postmenopausal bleeding) requires urgent investigation to exclude endometrial cancer. See a GP within 2 weeks. If you develop severe depression or suicidal thoughts during perimenopause, seek same-day clinical assessment.
What Causes Menopause & Its Symptoms?
Menopause is a natural biological process, not a disease. The symptoms arise from declining levels of oestrogen and progesterone as the ovaries reduce and eventually cease their hormonal function.
Declining oestrogen and progesterone from the ovaries causes all menopausal symptoms. The transition (perimenopause) typically begins in the mid-40s and lasts 4–8 years before the final period.
POI occurs when the ovaries stop functioning before age 40, causing premature menopause. This has significant implications for bone, cardiovascular, and cognitive health and requires HRT.
Chemotherapy, radiotherapy to the pelvis, and surgical removal of the ovaries cause immediate surgical menopause with sudden and often more severe symptoms.
Age-related oestrogen decline accelerates in the perimenopause — the transition lasting 4–8 years before the final period. Irregular periods, fluctuating oestrogen, and menopausal symptoms begin during this phase.
Women who smoke reach menopause 1–2 years earlier than non-smokers. Tobacco toxins damage ovarian follicles and accelerate oestrogen decline. Smoking cessation reduces this risk.
Women with a first-degree relative with early menopause or POI have significantly increased risk. Turner syndrome and fragile X premutation carriers are at high risk of premature ovarian insufficiency.
Key Risk Factors
How Is Menopause Diagnosed?
Menopause is diagnosed clinically in women over 45 who have not had a period for 12 months. No blood test is needed. In women under 45 with symptoms, FSH and oestradiol testing confirms premature ovarian insufficiency (POI). Perimenopause is diagnosed based on symptoms and cycle changes alone.
How Is Menopause Treated?
HRT is the most effective and recommended treatment for menopausal symptoms. The choice of preparation, route, and dose depends on symptom profile, uterine status, and individual health factors.
Supportive Measures
Alongside HRT, lifestyle measures meaningfully reduce symptom burden. Regular exercise reduces hot flush frequency and severity, improves sleep, and supports mood. Avoiding alcohol, caffeine, spicy food, and smoking reduces hot flush triggers. A calcium-rich diet and weight-bearing exercise protect bone health. Vaginal moisturisers and lubricants improve comfort independently of systemic HRT.
When Standard HRT Is Not Enough
For women whose symptoms are not controlled by standard HRT doses, specialist menopause clinic referral is appropriate. Testosterone therapy (for low libido), higher-dose oestrogen, or different HRT formulations may be required. For women with contraindications to systemic HRT, non-hormonal alternatives include SSRIs/SNRIs, clonidine, and cognitive behavioural therapy (CBT) for hot flushes and low mood.
When Should You Seek Medical Advice?
Postmenopausal vaginal bleeding (any bleeding more than 12 months after the last period) requires urgent investigation to exclude endometrial cancer. See a GP within 2 weeks or attend urgent care.
Menopausal symptoms are significantly affecting your quality of life · You are under 45 and your periods have stopped · You are already on HRT but symptoms are not controlled · You have postmenopausal bleeding · You want to discuss whether HRT is suitable for you.
Protecting Your Health Through Menopause
While menopause cannot be prevented, its impact on long-term health can be minimised through early hormone therapy and lifestyle measures.
HRT is the most effective treatment for menopause symptoms and should be offered to all eligible women. The benefits outweigh risks for most women under 60 who are within 10 years of menopause.
Weight-bearing exercise, adequate calcium (700mg/day) and vitamin D, and stopping smoking all protect bone density against the oestrogen-driven bone loss that accelerates at menopause.
Testosterone replacement therapy (TRT) in gel form is recommended for postmenopausal women with persistent low libido not responding to oestrogen alone. It is safe and effective and distinct from male TRT dosing.
NICE recommends that women who experience menopausal symptoms be offered HRT within 10 years of their last period or before age 60. Do not delay — early HRT maximises cardiovascular and bone protection.
Consider phytoestrogens (isoflavones from soy and red clover), black cohosh, and sage leaf extract as evidence-based complementary options for women who decline HRT. Evidence is moderate and effects are modest.
Psychoeducation about perimenopause — normalising symptoms, understanding their cause, and knowing treatment options — reduces anxiety and improves coping. Many women report that simply being informed is transformative.
Speak to a Clinician About Menopause and HRT
Through The GP Service, a licensed clinician can assess your symptoms, discuss HRT options, prescribe appropriate hormone therapy, and provide ongoing support — without a lengthy NHS wait.
Expert clinical advice, when you need it.
Menopause & HRT FAQs
HRT is the most effective treatment for menopausal symptoms and is recommended by NICE for eligible women. For most women under 60 who are within 10 years of menopause, the benefits of HRT — symptom relief, bone protection, and cardiovascular protection — substantially outweigh the risks. The main risk is a modest increase in breast cancer risk with combined (oestrogen + progestogen) HRT after 5 years. Body-identical HRT (oestradiol with micronised progesterone) appears to carry lower risk. HRT does not increase overall mortality. The decision to take HRT should be made individually with a clinician.
Acupuncture has some evidence for improving menopause symptoms, particularly hot flushes. Phytoestrogens (plant-based oestrogens found in soy and red clover) produce modest reductions in flush frequency. Black cohosh and sage leaf extract have limited positive evidence. Cognitive behavioural therapy (CBT) is NICE-recommended for menopausal low mood, anxiety, and sleep problems and is as effective as medication for these specific symptoms. None of these replaces HRT in efficacy, but they are valid options for women who choose not to take hormones.
Women taking body-identical HRT (oestradiol with micronised progesterone, such as Utrogestan) appear to have lower or no increased breast cancer risk compared to women taking synthetic progestogens. The risk with combined HRT is equivalent to drinking one glass of wine per day. The WHI (Women's Health Initiative) study that raised concerns about HRT used oral equine oestrogens and synthetic progestins — formulations largely no longer used in the UK. The absolute risk increase for breast cancer from HRT is very small and must be weighed against the significant benefits.
Endometriosis is an oestrogen-dependent condition that is inactive after the menopause once oestrogen levels fall. For most women, symptoms resolve after the final period. However, deep infiltrating endometriosis and adhesions from previous disease may continue to cause problems. Women on HRT after menopause may experience recurrence of symptoms if oestrogen levels are restored. Adding a progestogen to HRT after endometriosis helps protect against reactivation.
Irregular periods have many causes including PCOS, thyroid disorders, hyperprolactinaemia, perimenopause, significant weight loss, excessive exercise, eating disorders, and stress. A single irregular period is rarely cause for concern. Consistently irregular cycles — longer than 35 days or shorter than 21 days — warrant investigation with a blood test (FSH, LH, thyroid, prolactin) and a pelvic ultrasound. A missed period in a woman of reproductive age should always prompt a pregnancy test before other investigations.
Pericarditis is inflammation of the sac surrounding the heart, typically caused by a viral infection. It produces a sharp, stabbing chest pain that is typically worse when lying flat and relieved by leaning forward. It may be associated with fever and a pericardial friction rub on examination. Treatment is with NSAIDs (ibuprofen or aspirin) and colchicine for 3 months. Rest and avoidance of strenuous exercise during treatment are important. Pericarditis must be distinguished from myocarditis and aortic dissection, both of which are more serious.
Yes. During pregnancy, oestrogen levels rise significantly, increasing glycogen in vaginal cells which promotes Candida growth. Thrush is more common and more persistent in pregnancy. It is safe to treat with topical clotrimazole or other azole pessaries and cream — oral fluconazole is not recommended in pregnancy due to potential fetal risk. BV also occurs more frequently in pregnancy and should always be treated because it is associated with preterm birth, late miscarriage, and postpartum infection. Treat promptly with metronidazole (safe after the first trimester).
Pain during sex (dyspareunia) is a common symptom of several conditions affecting vaginal health: endometriosis (deep dyspareunia), atrophic vaginitis (superficial soreness on penetration), vulvodynia (vulval pain), vaginismus (involuntary muscle spasm), and untreated BV or thrush. It is not a normal part of sexual experience and always warrants clinical assessment. Treatment depends entirely on the underlying cause. Cognitive behavioural therapy, physiotherapy, lubricants, topical oestrogen, and specific infection treatment are all effective depending on the diagnosis.