On average it takes over six years to be diagnosed — usually because the pain was normalised, or because a scan came back clear and was treated as the end of the matter. It is not. Here is what endometriosis actually is, the three forms it takes, why the stage on a report tells you almost nothing about the pain, how it is diagnosed now without an operation, every treatment in order, and a short self-check.
Tissue similar to the lining of the uterus growing where it should not — on the pelvic lining, on the ovaries, in the ligaments behind the uterus, sometimes on the bowel or bladder. It responds to the same monthly hormones as the lining does, which is why the pain so often tracks the cycle. It affects somewhere around one woman in ten.
The average delay between symptoms starting and a diagnosis is over six years, and Indian guidance puts the usual range at four to eleven. Two things drive it: severe period pain gets normalised, and a clear scan gets treated as an all-clear when the commonest form of endometriosis cannot be seen on a scan at all.
You no longer need an operation to be diagnosed. European guidance now reserves laparoscopy for women whose imaging is inconclusive and whose treatment has not worked, and Indian guidance says the same. Treatment can start on the strength of the story and a scan. Most women have not been told this.
Ten questions, one minute. It cannot diagnose you — nothing can, from a distance — but endometriosis is suspected on the pattern of symptoms more than on any test, and this will tell you whether your pattern is one worth taking to a doctor.
Nothing you enter is stored or sent anywhere. This is a conversation starter, not a medical opinion.
Three forms, plus one close relative that is constantly mistaken for it — and they behave completely differently.
Flat deposits on the lining of the pelvis. The commonest form, and the one that is invisible on every scan — ultrasound and MRI both. This single fact explains most of the confusion women are put through: a completely normal scan is entirely compatible with disease that is causing severe pain.
A cyst of old blood within the ovary, often called a chocolate cyst. This is the form scans are good at: transvaginal ultrasound identifies it with around 93% sensitivity and 96% specificity. It is also the form where surgery carries a real cost, because removing the cyst removes some healthy ovary with it.
Nodules that burrow more than about five millimetres into tissue — the ligaments behind the uterus, the bowel, the bladder, the ureter. This is what produces pain deep during sex, pain opening the bowels, and urinary symptoms that track with the cycle. Skilled ultrasound picks these up in roughly 75 to 95% of cases depending on where they sit.
Deposits that settle in a caesarean or episiotomy scar, producing a firm lump that swells and becomes painful with each period. Uncommon, but regularly mistaken for a hernia, a stitch reaction or an abscess — sometimes for years. The giveaway is that the lump and the pain follow the cycle.
Rare, and worth knowing about only because the symptoms sound like something else entirely. Deposits on the diaphragm cause shoulder-tip or chest pain that arrives with the period; very rarely they affect the lung. If a symptom anywhere in the body reliably tracks your cycle, that is a pattern worth mentioning.
Not endometriosis, but constantly confused with it: here the lining tissue grows into the muscle wall of the uterus itself. It causes heavy periods with severe cramping, usually in a woman in her late thirties or forties. The two travel together often — adenomyosis is found alongside endometriosis in about a third of cases, and alongside deep infiltrating disease in about half.
Why this matters practically: the three forms differ in whether a scan can see them, in what symptoms they cause, and in whether surgery helps. “Endometriosis” on its own is not enough information to plan anything from.
Six patterns. The first is the one everybody knows; the third and fourth are the ones that most often go unmentioned.
Not pain that is inconvenient — pain that puts you in bed, makes you vomit, or costs you days of work or school every month. Pain that ordinary painkillers do not touch. This is the single most common presentation, and the one most often dismissed.
Endometriosis pain that has been present for years tends to stop confining itself to the period. Pain in the middle of the cycle, a constant background ache, or pain that has slowly spread through the month is a meaningful pattern rather than a separate problem.
Pain felt deep rather than at the entrance, often worse in certain positions and often lasting hours afterwards. It points particularly at deep disease behind the uterus. It is also the symptom women are least likely to mention unasked, which is why it gets asked about here.
Especially when it is worse around the period. Cyclical bowel or bladder symptoms are one of the clearest pointers to deep infiltrating disease, and they are frequently mislabelled as irritable bowel syndrome for years first.
Common, though not universal, and more typical when adenomyosis is also present. If bleeding rather than pain is your main problem, our page on heavy and irregular periods works through all nine causes.
Sometimes the first thing that brings a woman in. Endometriosis is found in roughly 40 to 50% of women investigated for infertility — which does not mean it always causes it, but does mean it should be thought about rather than discovered by accident.
A note on how these get missed: cyclical bowel symptoms are routinely labelled irritable bowel syndrome, deep pain during sex is rarely volunteered and rarely asked about, and period pain severe enough to stop a woman functioning is very often met with the observation that periods are painful. Each of those is a year or two of the six.
This surprises women more than anything else on this page.
The staging system in common use scores how much disease is visible and how stuck things are, and produces a number from I to IV. It was designed to describe anatomy at operation. It was never designed to predict how much pain a woman is in, and it does not.
Women with minimal disease can have severe, life-limiting pain. Women with extensive disease are sometimes found incidentally, having had few symptoms at all. This is not a rare exception — it is common enough that pain and stage are treated as separate questions.
Pain depends on where a deposit sits relative to nerves, on how much inflammation it generates, and on whether pain has been present long enough for the nervous system itself to become sensitised. A small deposit on a nerve hurts more than a large one somewhere quiet.
Two things. If your stage is low, that is not evidence your pain is exaggerated. And if your stage is high, that alone is not a reason to operate. Treatment is aimed at the symptoms you actually have.
The pathway changed in 2022, and the change is very much in your favour.
The pattern of the pain does more diagnostic work here than any test. When it started, whether it has worsened over years, whether it confines itself to the period, whether it is deep during sex, whether it involves the bowel or bladder cyclically. A doctor who asks these questions will suspect endometriosis long before a scan does.
Both European and Indian guidance name ultrasound as the first imaging step — but the operator has to be looking for endometriosis specifically. A routine scan reports the uterus and ovaries; a targeted scan also assesses the pouch behind the uterus, ovarian mobility and the bowel wall. Scans are arranged by referral from the clinic.
Useful for mapping nodules before surgery and for telling an endometrioma from other cysts. It picks up lesions above about five millimetres — and, like ultrasound, it does not see superficial peritoneal disease at all.
Indian guidance is blunt about this: CA-125 “is not of much value in diagnosing the disease nor for follow-up”, and a negative result does not rule it out. European guidance goes further and recommends against using any blood, tissue or fluid biomarker to diagnose endometriosis. If you have been given a CA-125 as the test for endometriosis, it was not the right test.
This is the change most women have not been told about. Laparoscopy used to be the only way to be diagnosed. Since 2022, guidance reserves it for women whose imaging is inconclusive and in whom treatment has not worked or is not appropriate. You do not need an operation to be diagnosed, and you do not need one before treatment can start. Where it is the right step, our page on laparoscopic surgery explains what it involves.
The single most important sentence in current guidance, stated plainly: negative imaging does not exclude endometriosis, particularly superficial peritoneal disease. If a clear scan was where your investigation stopped, it stopped too early.
Medical treatment first for almost everyone, and treatment after surgery for almost everyone who has surgery.
Anti-inflammatory tablets work far better started a day before the pain than swallowed at its peak, and they are frequently under-dosed. Not a solution on its own, but the difference between taking them well and taking them badly is larger than most women expect.
Named as a first-line option by both European and Indian guidance. The important detail is continuously rather than with a monthly break — if the pain comes with the bleed, removing the bleed removes the pain. Cheap, widely available, and doubles as contraception.
Also first-line. Dienogest at 2 mg is the one licensed specifically for endometriosis pain and has good evidence behind it. Progestogens suit women who cannot take oestrogen, and they can be continued for years.
Studies place it on a par with GnRH treatment for endometriosis pain, without the menopausal side effects, and Indian guidance names it a first-line option even in sexually active adolescents. It also lowers the recurrence rate after surgery. In the Indian setting we plan on five years per device. See our guide to the Mirena as a treatment.
Effective, and useful for a limited period — typically to settle severe symptoms or before surgery. They induce a temporary menopausal state, so they are given with add-back hormone therapy and are not a long-term answer.
The right step when medical treatment has failed or is not tolerated, when pain is disabling, when anatomy is distorted, or in some cases of infertility. Where surgery is done, guidance favours excising lesions rather than burning them, and for an endometrioma favours removing the cyst wall rather than draining it.
This is the most commonly skipped step in the whole pathway. Guidance recommends a hormonal coil or a combined pill for at least 18 to 24 months after surgery to prevent recurrence. Operating and then sending a woman home on nothing is how women end up back in theatre.
If conception is the aim, the plan is different from the plan for pain, and the two are sometimes in tension — hormonal treatment controls pain but prevents pregnancy. That conversation is worth having explicitly rather than by default.
Pelvic floor physiotherapy, structured exercise, heat, sleep and help with pain that has become chronic all have a genuine place, particularly where pain has been present for years and the nervous system has become sensitised. They are additions to treatment, not substitutes for it.
One point deserves repeating because it is skipped so often: guidance recommends a hormonal coil or a combined pill for at least 18 to 24 months after surgery to prevent the disease and the pain coming back. Surgery followed by nothing is how women end up having a second operation, and Indian guidance is explicit that repeat surgery is counterproductive.
Four things worth knowing before you consent to an operation.
Where surgery is done, guidance favours cutting the deposits out rather than destroying them with heat, on the grounds that it gives better pain relief. It is more demanding surgery, which is part of why it is not universal.
Removing the cyst wall gives lower recurrence and better pain relief than simply draining it. But the same guidance that recommends it also says, in a separate strong recommendation, that specific caution must be used to minimise damage to the ovary. Both halves matter: an endometrioma operation done casually costs ovarian reserve you cannot get back.
Indian guidance puts it bluntly: recurrent surgeries are counterproductive and cause more harm. If you are being offered a second or third laparoscopy for the same pain, that is the moment to ask what will be different this time, and what medical treatment is planned afterwards.
Guidance states directly that women must be told hysterectomy will not necessarily cure the symptoms or the disease. Endometriosis lives outside the uterus; removing the uterus does not remove it. It has a place for some women who have completed their family and exhausted other options — our page on hysterectomy covers that honestly — but it is not the cure it is often presented as.
A real issue, and a smaller one than most women fear when they first hear the word.
It is found in roughly 40 to 50% of women being investigated for infertility, which sounds alarming read backwards. Read forwards it is less so: having endometriosis reduces the chance of conceiving in any given month for many women, but it does not make pregnancy unlikely, and a great many women with it conceive without any help at all.
Every effective medical treatment for endometriosis pain also prevents pregnancy. That tension is real and needs deciding deliberately — not discovered a year later. If conception is the near-term goal, say so at the first appointment.
This is where the caution about ovarian reserve becomes concrete. Removing a chocolate cyst removes healthy ovarian tissue with it, and repeated operations on the same ovary compound the damage. When fertility matters, that trade-off has to be on the table before the operation, not after.
Our guide to preconception counselling covers the tests genuinely worth doing before trying, and which widely sold ones are not recommended.
Four steps, in this order.
Endometriosis is suspected on the story more than on any test. That takes time and it takes being asked about pain during sex and about bowel and bladder symptoms — questions many women are never asked, and few volunteer.
A targeted transvaginal ultrasound, arranged by referral and requested specifically for endometriosis rather than as a routine pelvic scan. MRI where deep disease is suspected and surgery is on the table.
If the picture fits, treatment does not have to wait for an operation to confirm it — that is precisely what current guidance permits. What matters is a clear review date and an honest conversation about what happens if the first option does not work.
Done laparoscopically, excising rather than burning, with real care around the ovary. Indian guidance is explicit that repeat operations are counterproductive, so the plan afterwards is agreed before the operation rather than after it.
Consultation, blood tests and IV medication where needed are done at the clinic. Scans are arranged by referral. Laparoscopy and any surgery are carried out at hospital.
Three guides that pick up where this page stops.
The long-form version: what the pain means, and why it goes unrecognised for years.
Read the guide →If bleeding rather than pain is the main problem — all nine causes and every treatment.
Read the guide →As effective as GnRH treatment for endometriosis pain, without the menopausal side effects.
Read the guide →Bring a record of your pain if you have one — when it comes, how long it lasts, what it stops you doing — along with any previous scan or operation reports. Second opinions are actively welcomed, including on surgery already advised elsewhere. Open 7 days, including Sundays.
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Dr. Anam Ghani brings over 12 years of experience in obstetrics and gynaecology, having served at Motherhood Hospital, Lady Hardinge Medical College, GTB Hospital, Kasturba Hospital and DDU Hospital. Her practice covers endometriosis and chronic pelvic pain, from medical management through laparoscopic surgery, alongside 8000+ deliveries.
Every procedure is explained clearly and planned around your health, your wishes and your recovery, with the least invasive approach suitable for your case.
MBBS · MS (Obstetrics & Gynaecology) · 12+ Years Clinical Experience
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Not sure whether this is your problem? Try the self-check above, or read the longer guide to why painful periods are not something to live with.
Keyhole surgery for endometriosis and cysts, when medical treatment has not been enough.
Learn more →Removing a chocolate cyst while protecting as much healthy ovary as possible.
Learn more →When bleeding rather than pain is the dominant problem.
Learn more →Insertion and removal of the hormonal coil, done at the clinic.
Learn more →Why it is not a cure for endometriosis, and when it still has a place.
Learn more →Planning a pregnancy when endometriosis is part of the picture.
Learn more →Tissue similar to the lining of the uterus growing outside it, most often on the lining of the pelvis, on the ovaries and in the ligaments behind the uterus, and sometimes on the bowel or bladder. It responds to the same monthly hormones as the lining does, which is why the pain so often follows the cycle. It affects roughly one woman in ten of reproductive age.
Longer than it should. Across studies the average delay between symptoms starting and a diagnosis is about six and a half years, and Indian guidance describes a usual range of four to eleven years. The delay is spread across the whole pathway: getting to a doctor, getting referred, and then getting a diagnosis once referred.
Two reasons above all. Severe period pain gets normalised, by families and sometimes by doctors, so women wait years before mentioning it. And when they do, a clear ultrasound is often taken as an all-clear, when the commonest form of endometriosis cannot be seen on any scan.
No, and this is the biggest change in recent guidance. Laparoscopy used to be the only route to a diagnosis. Since 2022, European guidance reserves it for women whose imaging is inconclusive and in whom treatment has been unsuccessful or is inappropriate, and Indian guidance says the same. Treatment can be started on the strength of the history and a scan.
No. Guidance states explicitly that negative imaging does not exclude endometriosis, particularly superficial peritoneal disease, which is the commonest form and is invisible on both ultrasound and MRI. A clear scan rules some things out. It does not rule this out.
No. Indian guidance says CA-125 is not of much value for diagnosing endometriosis or for follow-up, and that a negative result does not rule it out. European guidance recommends against using any blood, tissue or fluid biomarker to make the diagnosis. It is one of the most commonly ordered and least useful tests in this condition.
A transvaginal ultrasound requested specifically for endometriosis, rather than a routine pelvic scan. The difference is what the operator looks at: ovarian mobility, the pouch behind the uterus, the bowel wall. For an ovarian endometrioma, transvaginal ultrasound is very accurate, with sensitivity around 93% and specificity around 96%.
Mainly when deep infiltrating disease is suspected and surgery is being considered, because it maps where the nodules sit. It is also useful for telling an endometrioma from other kinds of cyst. It detects lesions above about five millimetres, and like ultrasound it does not see superficial peritoneal disease.
Three. Superficial peritoneal disease sits flat on the pelvic lining and is invisible on scans. An ovarian endometrioma, or chocolate cyst, is a collection of old blood within the ovary and is what scans see best. Deep infiltrating endometriosis burrows more than about five millimetres into tissue and is what causes deep pain during sex and cyclical bowel or bladder symptoms.
Not in the way people assume. The staging system scores how much disease is visible and how stuck things are; it was designed to describe anatomy at operation, not to predict pain. Stage I disease can cause severe, life-limiting pain and stage IV can be found almost incidentally. A low stage is not evidence that your pain is exaggerated.
Because pain depends on where a deposit sits rather than how much of it there is. A small deposit on or near a nerve hurts more than a large patch somewhere with few nerve endings. Inflammation and, over years, sensitisation of the nervous system itself both add to it.
Endometriosis is lining-like tissue growing outside the uterus. Adenomyosis is lining tissue growing into the muscle wall of the uterus itself. Adenomyosis typically causes heavy periods with severe cramping in a woman in her late thirties or forties. They frequently coexist: adenomyosis is found alongside endometriosis in around a third of cases and alongside deep infiltrating disease in around half.
Hormonal treatment. Both European and Indian guidance name the combined pill, progestogens including dienogest, and GnRH treatment as options for endometriosis pain, with the combined pill and progestogens as first-line. Anti-inflammatory painkillers, taken properly, sit alongside them.
For endometriosis pain, usually yes. Indian guidance prefers continuous use over cyclical dosing, and the logic is simple: if the pain arrives with the bleed, removing the bleed removes the pain. It is worth asking about specifically, because the default prescription is often cyclical.
A progestogen given at 2 mg daily and licensed specifically for endometriosis. It has good evidence for reducing endometriosis-associated pain and improving quality of life, and it suits women who cannot take oestrogen. Like all these treatments, it prevents pregnancy while it is being taken.
Yes, and it is underused. Studies place the hormonal coil on a par with GnRH treatment for endometriosis pain, without the menopausal side effects, and Indian guidance names it a first-line option including in sexually active adolescents. It also lowers the rate of recurrence after surgery. In the Indian setting we plan on five years per device.
No. They work, but they induce a temporary menopausal state, so they are given with add-back hormone therapy and used for a limited period, typically to settle severe symptoms or in the run-up to surgery. They are not a treatment to stay on indefinitely.
When medical treatment has failed or cannot be tolerated, when pain is disabling, when anatomy is significantly distorted, in some cases of infertility, and in emergencies such as a ruptured cyst. It is not the first step, and current guidance does not treat it as one.
Guidance suggests excising rather than ablating, on the grounds that it gives better relief of endometriosis-associated pain. It is more technically demanding surgery, which is part of why it is not done universally, and it is a reasonable thing to ask about before consenting.
Removed. Guidance recommends removing the cyst wall rather than draining and coagulating it, because that lowers recurrence and relieves pain better. The same guidance separately insists that specific caution be used to minimise damage to the ovary, and both halves of that matter.
It can. Removing the cyst wall takes some healthy ovarian tissue with it, and surgery on an endometrioma is known to reduce ovarian reserve. Repeated operations on the same ovary compound it. If fertility matters to you, that trade-off belongs in the conversation before the operation, not after.
It is worth pausing on. Indian guidance states plainly that recurrent surgeries are counterproductive and lead to more harm. The questions to ask are what will be different this time, and what medical treatment is planned for afterwards, because surgery without a plan for the following two years tends to lead to the next operation.
Medical treatment, and it is the step most often skipped. Guidance recommends a hormonal coil or a combined pill for at least 18 to 24 months after surgery to prevent the pain and the disease returning. Being operated on and sent home on nothing is a recognised route back to theatre.
No, and guidance requires that women be told so: hysterectomy will not necessarily cure the symptoms or the disease. Endometriosis lives outside the uterus, so removing the uterus does not remove it. It has a place for some women who have completed their family and exhausted other options, but it is not the cure it is often presented as.
For most women, no. It is found in around 40 to 50% of women being investigated for infertility, but a great many women with endometriosis conceive without any assistance. It can reduce the chance in any given month, which matters more the longer you have been trying and the older you are.
Not while you are trying, because every effective medical treatment for endometriosis pain also prevents pregnancy. That is a genuine tension and it needs deciding deliberately with your doctor rather than by default. Say at the first appointment that conception is the goal, because it changes the whole plan.
Usually the pain settles considerably once the ovaries stop producing oestrogen, since the deposits depend on it. It is not universal, and hormone replacement therapy can occasionally reactivate symptoms, so it is worth mentioning a history of endometriosis if HRT is being considered.
There is a familial tendency. Having a mother or sister with endometriosis raises your own risk, which is why it is worth asking about and worth mentioning at an appointment. It is not a simple inherited condition, and plenty of women with it have no family history at all.
They have a genuine place alongside treatment, particularly where pain has been present for years. Pelvic floor physiotherapy, regular exercise, heat, sleep and structured help for chronic pain all help some women meaningfully. They work best as additions to medical treatment rather than as replacements for it.
A record of the pain if you can keep one for a few weeks: when it comes, how long it lasts, and what it stops you doing. Any previous scan reports and, if you have had surgery, the operation notes. And the names, doses and durations of anything you have already tried.
Discuss your symptoms and plan treatment at either location. Open 7 days a week, including Sundays.