Your Body

Adenomyosis: the heavy, dragging periods nobody names

Adenomyosis is what happens when tissue similar to the womb lining grows into the muscular wall of the womb rather than outside it. That muscle wall becomes thickened, tender and enlarged, and it cramps against itself. The typical picture is very heavy periods, deep cramping that feels more like labour than an ache, a constant dragging heaviness low in the pelvis, and a womb that can feel swollen or bloated. It is common, it often sits alongside endometriosis or fibroids, and unlike endometriosis it can usually be seen on a good scan, which means it is one of the more gettable diagnoses if you know to ask for it.

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Sound like you?

If your periods are more about volume and pressure than sharp pain, this one may fit better than endometriosis.

🩸Bleeding heavy enough that you plan your life around it, flooding, big clots, changing protection hourly.

⚓A heavy, dragging, bearing-down feeling low in your pelvis, not just cramps.

🧊Your stomach looks and feels swollen for days, and your clothes do not fit the same.

🪶You are exhausted and pale, and anaemia has come up before, or never been checked.

💜Bleeding this heavy is not something to simply manage around. It is treatable, and the treatments work well.

What it actually is

Endometrial-like tissue embedded in the myometrium, the muscle layer of the womb. Each cycle it responds to hormones and bleeds inside the muscle, which causes inflammation and makes the muscle thicken. An adenomyotic womb is often noticeably larger and described on scans as “bulky” or “globular”. Because the bleeding surface inside the womb is bigger and the muscle cannot contract down properly, periods get much heavier as well as more painful.

How it differs from endometriosis

Endometriosis grows outside the womb; adenomyosis grows inside its wall. Endometriosis tends to cause pain that spreads through the pelvis and can affect the bowel and bladder; adenomyosis more typically causes heavy bleeding and deep central cramping with a sense of weight. They frequently occur together, and fibroids can be in the mix too. You can have more than one of these, which is part of why a single diagnosis sometimes does not explain all of your symptoms.

It is usually visible on a scan

This is the practically useful part. A transvaginal ultrasound, done by someone who knows what to look for, or an MRI, can show the thickened, asymmetrical womb wall. That makes adenomyosis far easier to confirm than endometriosis, which often needs surgery. So if heavy, painful periods are your main problem, asking specifically for a transvaginal ultrasound is a concrete, reasonable request.

Who gets it

It is diagnosed most often in the thirties and forties, and more often in people who have been pregnant, but it happens at any age after periods start, including in teenagers. It is not caused by anything you did. Symptoms usually settle after menopause, because the tissue depends on oestrogen, but that is not much comfort if you are thirty-four, so it is worth treating rather than waiting out.

You are not weak for struggling with something this heavy. You are strong for carrying it this long without answers.

What actually helps, from simplest to most definitive

Most people do well on the earlier options. You do not have to work through them in order, but it is useful to know what exists.

Treat the bleeding directly

Tranexamic acid, taken only on heavy days, reduces blood loss substantially and is not a hormone. Mefenamic acid or naproxen reduce both bleeding and pain. Both are available on prescription from a GP, no specialist needed, and for a lot of people this alone changes the month. Start them at the first sign of bleeding rather than once it is heavy.

The hormonal coil is often the most effective option

A levonorgestrel intrauterine system, usually the Mirena, releases progestogen directly into the womb, thins the lining and is generally the most effective non-surgical treatment for adenomyosis. Many people stop bleeding almost entirely. Fitting is uncomfortable and you are entitled to ask about pain relief beforehand, but a few minutes of discomfort against years of flooding is a trade a lot of people are glad they made.

Other hormonal routes

The combined pill taken continuously, progestogen-only pills, the implant, or the injection can all reduce bleeding and pain. GnRH analogues, which temporarily switch off your cycle, are sometimes used before surgery or when nothing else has worked. Each has trade-offs worth discussing properly rather than accepting the first thing offered.

Procedures and surgery

Uterine artery embolisation reduces the blood supply to the affected muscle and can work well while keeping the womb. Endometrial ablation is sometimes used, though it is less reliable when adenomyosis is deep. Hysterectomy is the only definitive cure and is the right answer for some people, but it is a major operation and an irreversible one, so it belongs at the end of the conversation, not the start.

Get your iron checked, properly

Heavy periods month after month are one of the most common causes of iron deficiency, and you can be iron deficient while your standard full blood count still looks acceptable. Ask specifically for a ferritin level. Correcting low iron often lifts the exhaustion, breathlessness and brain fog that people assume are just part of the condition.

🧰Your adenomyosis tool kit

Sentences that get you a scan “My periods are heavy enough to affect my daily life.” “Could we arrange a transvaginal ultrasound to look for adenomyosis or fibroids?” “Could you check my ferritin as well as my full blood count?”

A two-cycle bleeding log How many days, how often you changed protection, whether you flooded or passed clots, days you could not leave the house. Objective numbers are what get heavy bleeding treated rather than normalised.

Endometriosis UK and the NHS pages Endometriosis UK covers adenomyosis too and has a helpline on 0808 808 2227. The NHS heavy periods and adenomyosis pages are accurate and short.

Practical kit for heavy days Period pants or a menstrual cup for capacity, a heat patch for the dragging ache, tranexamic acid ready in the cupboard rather than requested mid-flood, and a spare set of clothes in your bag on your heaviest days. Not glamorous. Genuinely stabilising.

✨Try this: make the bleeding countable

“It's really heavy” is easy to dismiss. Numbers are not:

For two cycles, log each day: how many pads or tampons, how often you changed them, clots yes or no, flooding yes or no.
Note any day you cancelled something, missed work, or did not leave the house because of bleeding.
Write one sentence at the top: for example, “Changing every hour for two days, flooding through clothes, three days off work in two months.”
Take it in and ask for the two specific things: a transvaginal ultrasound, and a ferritin test.

Going deeper: adenomyosis, the one nobody mentions

Endometriosis has finally entered public conversation. Its close relative has not, which is why so many people spend years being told heavy bleeding is just their normal.

Tissue growing into the muscle wall

The uterus has three layers: the lining that sheds each month, a thick muscular middle wall, and an outer covering. In adenomyosis, lining-type tissue grows down into that muscular wall. Once it is there, it still responds to the monthly hormonal signals, so it thickens and bleeds inside the muscle itself.

Two consequences follow, and between them they explain almost every symptom. First, blood trapped inside muscle causes inflammation and swelling, which is why the uterus often becomes enlarged and tender and why many people describe a heavy dragging feeling rather than a sharp pain. Second, a muscle threaded through with this tissue does not contract cleanly, which is why bleeding is frequently very heavy and why cramping can be intense and grinding rather than coming in neat waves.

The two conditions frequently occur together, which is one reason symptoms can be hard to untangle.

Why heavy bleeding is a medical issue, not just an inconvenience

Heavy menstrual bleeding is the symptom most often waved through, and it is the one with the clearest physical consequence. Losing significant blood month after month depletes iron stores, and iron depletion arrives long before anaemia shows up on a standard full blood count. That matters because low iron produces exactly the symptoms that get labelled as stress or low mood: exhaustion that sleep does not touch, breathlessness on stairs, brain fog, hair shedding, cold hands, and a heart that races on mild effort.

This is why a specific request is worth making. A full blood count can look acceptable while ferritin, the measure of stored iron, is on the floor. If you bleed heavily, asking for ferritin rather than only a full blood count is one of the highest-value things you can do in an appointment, because a treatable cause of years of exhaustion sometimes shows up in that single number.

The words worth knowing

Myometrium. The muscular wall of the uterus. Adenomyosis is defined by lining tissue being found within it.

Menorrhagia. The clinical term for heavy menstrual bleeding. Flooding through protection, passing large clots, or needing to change protection hourly all count, and all are worth reporting plainly.

Ferritin. Stored iron. Can be low while haemoglobin is still normal, so it is the number that explains fatigue when a routine blood test came back fine.

Transvaginal ultrasound and MRI. Unlike endometriosis, adenomyosis often can be seen on imaging, particularly on MRI or a good quality internal scan. A bulky, tender, globally enlarged uterus is a recognised picture.

Comorbid. Occurring alongside. Adenomyosis, endometriosis and fibroids commonly appear together, so finding one does not mean the others have been excluded.

Three things worth challenging

The beliefHeavy periods run in my family, so this is just my normal.

Closer to the truthFamilies often share conditions as well as norms. Several relatives with brutal periods can mean an inherited pattern of a treatable condition rather than proof that brutal periods are fine. Normal for your family is not the same as normal.

The beliefIt only affects women who have had children.

Closer to the truthIt is more frequently diagnosed in people who have been pregnant and in their thirties and forties, but it is found in people who have never been pregnant and in younger people too. The association has almost certainly contributed to younger patients being overlooked.

The beliefNothing can be done short of a hysterectomy.

Closer to the truthHysterectomy is definitive but it is not the starting point. Hormonal options including the hormonal coil, tranexamic acid to reduce bleeding, anti-inflammatory painkillers taken properly, and iron replacement all have a place, and it is entirely reasonable to work through them.

What to take into an appointment

Quantify the bleeding, because clinicians respond to numbers in a way they do not respond to adjectives. Record how many pads or tampons you use a day and how often you change them, whether you flood through onto clothes or bedding, the size of any clots, how many days you bleed, and how many days a month you cannot work, study or leave the house. Two or three cycles of that is a strong case.

Then ask directly. Whether adenomyosis or fibroids could explain this, whether an internal ultrasound is appropriate, whether your ferritin can be checked as well as your full blood count, and what can be started now to reduce bleeding while investigations happen. If you are being offered nothing and your symptoms are costing you working days, that is reasonable grounds to ask for a gynaecology referral or a second opinion, and asking is a normal part of using the NHS rather than an imposition on it.

Why this matters

Heavy periods get normalised more thoroughly than almost any other symptom. People organise their work, holidays, wardrobe and sex life around bleeding they have been told is just how they are built, and lose years to an exhaustion that turns out to be untreated iron deficiency. Adenomyosis is a real, visible, treatable condition with a name. Having the name lets you ask for the right scan and the right treatment instead of quietly enduring, and the first-line treatments are simple and often work quickly.

This is general information, not a diagnosis. Adenomyosis is diagnosed by imaging, usually a transvaginal ultrasound or MRI, so please see a GP rather than deciding from a symptom list. Seek urgent help if you are soaking a pad or tampon every hour for two hours or more, passing clots bigger than a golf ball, feeling faint or breathless, or bleeding heavily with severe pain.

Understand it

Adenomyosis is when tissue from the womb lining grows into the muscular wall of the womb. It can cause heavy or painful periods, pelvic pain, bloating and pain during sex, though some people have no symptoms. Treatment depends on symptoms and future pregnancy plans.

You might also notice:

Bleeding heavy enough that you plan your life around it, flooding, big clots, changing protection hourly.
A heavy, dragging, bearing-down feeling low in your pelvis, not just cramps.
Your stomach looks and feels swollen for days, and your clothes do not fit the same.
You are exhausted and pale, and anaemia has come up before, or never been checked.
A gentle place to start: What it actually is.
Another thing worth trying: How it differs from endometriosis.

In real life

If you are changing protection very frequently, bleeding through clothes, avoiding movement because of pain or feeling breathless and depleted, say those details clearly; heavy bleeding can also contribute to iron-deficiency anaemia.

Other ways this can show up:

Your stomach looks and feels swollen for days, and your clothes do not fit the same.
You are exhausted and pale, and anaemia has come up before, or never been checked.
Bleeding heavy enough that you plan your life around it, flooding, big clots, changing protection hourly.
A heavy, dragging, bearing-down feeling low in your pelvis, not just cramps.
One small thing to try: It is usually visible on a scan.
You might also try: Who gets it.

Trusted next step: NHS adenomyosis guidance