A Practical Guide to HRT and Endometriosis

For many women, a guide to HRT and endometriosis is needed at exactly the point when symptoms feel most confusing. You may be experiencing hot flushes, poor sleep, anxiety, joint aches or vaginal dryness alongside a history of painful periods, surgery or pelvic pain. HRT can be life-changing for menopausal symptoms, but endometriosis means the type, timing and balance of treatment deserve careful thought.

The reassuring news is that a history of endometriosis does not automatically rule out HRT. It does mean that your plan should be individualised, with attention to your symptoms, previous treatment, whether you have had surgery, and any possibility of remaining endometriosis.

Why endometriosis can affect HRT decisions

Endometriosis is a condition in which tissue similar to the lining of the womb grows elsewhere in the body, commonly in the pelvis. These deposits can respond to oestrogen. Although endometriosis often improves after menopause, particularly when periods have stopped naturally, it does not always disappear completely.

HRT replaces hormones that decline during perimenopause and menopause, most notably oestrogen. Oestrogen is highly effective for symptoms such as flushes, night sweats, sleep disturbance and urogenital symptoms. However, in someone with residual endometriosis, oestrogen may theoretically stimulate remaining deposits and contribute to recurrence of pain or other symptoms.

This is not a reason to leave distressing menopause symptoms untreated. It is a reason to choose HRT thoughtfully and review it properly. For women who experience early or surgical menopause, treating low oestrogen is particularly important for bone, heart and long-term health, as well as day-to-day quality of life.

HRT and endometriosis: the role of progestogen

If you still have a womb, combined HRT is usually needed. This contains both oestrogen and a progestogen, which protects the lining of the womb from becoming excessively thickened under the influence of oestrogen.

With endometriosis, progestogen may have a second role. It can help reduce the chance that oestrogen stimulates any endometriosis that remains. For this reason, many menopause specialists favour continuous combined HRT for women with a significant history of endometriosis, including some women who have had a hysterectomy.

This can seem surprising. After a hysterectomy, progestogen is not usually required to protect the womb lining because the womb has been removed. But where there has been severe endometriosis, deep endometriosis or known residual disease, adding continuous progestogen can still be considered to help suppress stimulation of remaining endometriosis deposits.

There is no single regimen that suits everyone. Options may include body-identical micronised progesterone, a progestogen-containing intrauterine system, or other progestogen preparations. The most appropriate choice depends on your medical history, tolerability, bleeding pattern, contraceptive needs and personal preferences.

Is oestrogen-only HRT suitable?

Oestrogen-only HRT is generally used after hysterectomy in women without a history of endometriosis. In women with previous endometriosis, it is often avoided, particularly in the years following surgery or where disease may remain.

The concern is not simply recurrent pelvic pain. There are rare reports of residual endometriosis changing in response to unopposed oestrogen. The overall risk for an individual woman may be low, but it is sensible to take it seriously and make decisions with a clinician experienced in both menopause care and complex gynaecological histories.

There are circumstances where oestrogen-only treatment may still be discussed, such as when a progestogen causes unacceptable side effects or when the details of past endometriosis suggest very low risk. This is a shared decision rather than a blanket rule. The aim is to weigh symptom relief, long-term health and the potential for endometriosis activity in a way that feels safe and realistic for you.

What happens after surgical menopause?

Removal of both ovaries causes a sudden fall in oestrogen, known as surgical menopause. Symptoms can be abrupt and intense, especially when surgery happens before the usual age of menopause. Women may experience severe flushes, insomnia, low mood, brain fog, loss of libido and vaginal symptoms within weeks.

In this situation, HRT is often strongly considered unless there is a specific reason not to prescribe it. For women who undergo surgical menopause at a younger age, replacing hormones at least until around the average age of natural menopause is often important for protecting bone density and supporting cardiovascular health.

The balance of hormones is particularly relevant after surgery for endometriosis. Your specialist will consider the extent of disease found at surgery, whether the womb was removed, whether there may be residual deposits, your age and your current symptoms. A continuous combined approach is commonly chosen, but the plan should be reviewed if side effects, pain or bleeding occur.

Choosing the type and route of HRT

HRT is not one treatment. Oestrogen can be prescribed as a gel, spray, patch or tablet. Transdermal oestrogen, given through the skin as a patch, gel or spray, is often preferred where there are risk factors for blood clots, migraines or other relevant health considerations. It also allows dose adjustments without changing the whole treatment plan.

The right dose is the lowest dose that effectively controls symptoms, but this should not be confused with undertreating significant menopause symptoms. Some women need dose adjustments over time, especially during perimenopause when hormone levels can fluctuate considerably.

Tibolone is another prescription option that may be appropriate for some post-menopausal women. It has oestrogenic, progestogenic and androgenic effects, and may help some symptoms including low libido. Its suitability in the context of endometriosis needs individual specialist assessment rather than assumption.

Local vaginal oestrogen can be very helpful for vaginal dryness, discomfort during sex, recurrent urinary symptoms and urinary urgency. It works mainly in the vaginal and vulval tissues and is absorbed into the bloodstream in very low amounts. It can usually be used alongside systemic HRT, but your wider history should still be taken into account.

Symptoms that need review

Starting HRT should come with a clear plan for follow-up. Some settling symptoms are common in the first few months, including breast tenderness, bloating, mood changes or light bleeding, depending on the regimen. They should not simply be endured if they are affecting your life. A change in dose, formulation or progestogen can make a meaningful difference.

New or returning pelvic pain, pain during sex, bowel symptoms linked to pelvic pain, unexplained bleeding after menopause, or bleeding that persists beyond the expected adjustment period should be assessed. These symptoms do not necessarily mean endometriosis has returned, but they warrant proper evaluation rather than being dismissed as an inevitable part of HRT.

It is also worth discussing symptoms that are easily attributed to menopause but may have other causes, including fatigue, palpitations, low mood and changes in weight. Blood tests are not routinely needed to diagnose menopause in women over 45 with typical symptoms, but they can be useful when the clinical picture is unclear or when other conditions need to be excluded.

Preparing for a specialist consultation

A good HRT consultation should give you time to explain the full picture, not just tick through a list of hot flushes. Bring details of previous endometriosis surgery where possible, including whether your ovaries and womb were removed. Note your current symptoms, their timing, your bleeding pattern, medicines and supplements, family history, migraines, blood clot history and any previous experience of hormones.

Your clinician should explain why a particular treatment is being recommended, what alternatives exist and what symptoms should prompt review. You should also have a practical route for adjusting treatment if it is not working for you. Menopause care is often a process of refinement, not a one-off prescription.

Endometriosis and menopause can both affect sleep, mood, relationships, sexual wellbeing and confidence. You deserve care that recognises these connections and treats you as a whole person, with evidence-based choices that fit your health history and priorities. To discuss a personalised plan, please visit our consultations page.