Why Endometriosis Often Gets Missed for Years
There is a conversation that happens in my clinic more often than it should.
A woman sits across from me and tells me about her periods. Heavy, painful, and sometimes completely debilitating. She has missed work, cancelled plans, and spent years managing the pain with ibuprofen and a heat pack and the quiet belief that this is just how it is for her.
Then she tells me what her doctor said.
"That's normal for some women."
And she believed them, because why wouldn't she? They were the expert.
What nobody told her was that painful periods are common, but common is not the same as normal, and it is certainly not something you should just push through every month.
The Problem With "Normal"
Endometriosis affects roughly 1 in 10 women and is one of the most under-diagnosed conditions in women's health, with the average time to diagnosis sitting anywhere between 7 and 10 years in many countries.
Seven to ten years of being told your pain is normal, your symptoms are manageable, and that you are perhaps just more sensitive than other women.
Part of why this happens is structural. Endometriosis does not reliably show up on a standard ultrasound. The tissue that behaves like the uterine lining but grows outside of it, on the ovaries, the fallopian tubes, the bowel, and the bladder, is often invisible on imaging unless someone is specifically and expertly looking for it. A clear ultrasound does not mean nothing is happening.
The other part is cultural. We have normalised women's pain in a way that has real consequences. When a teenage girl is told her painful periods are just part of being a woman, she learns not to question it, carries that belief into her twenties and thirties, and by the time she is sitting in a fertility clinic wondering why she cannot conceive, she has spent decades dismissing her own body's signals.
It Is Not Just Period Pain
One of the reasons endometriosis is so frequently missed is that its symptoms stretch well beyond the cycle itself.
Women with endometriosis often describe severe cramping that does not respond well to over-the-counter pain relief, pain that starts days before the period and lingers after it ends, pain during or after sex, and fatigue that feels completely out of proportion to what is happening in their life.
But here is the one that surprises people the most: digestive symptoms. Bloating, constipation, diarrhoea, and nausea that flares predictably in the days before and during menstruation. These are so commonly misattributed to IBS that many women carry that diagnosis for years before anyone connects it to their cycle.
If your gut symptoms have a hormonal rhythm to them, that is worth paying close attention to, because your body is giving you information and the question is whether someone is actually listening.
The Fertility Connection
Many women do not discover they likely have endometriosis until they are trying to conceive and struggling to get answers.
Unexplained infertility is one of the most frustrating diagnoses a woman can receive, because it means the standard tests have not found a clear cause, not that nothing is wrong. It means the current investigation has not found it yet.
Endometriosis can affect fertility in several ways, altering the environment in the pelvis, affecting egg quality, impacting the function of the fallopian tubes, and creating an inflammatory environment that makes implantation more difficult, none of which necessarily show up on a basic fertility workup.
I had a patient come to me with unexplained infertility who had been trying to conceive for over two years with largely normal test results. But when I asked about her periods, the picture shifted quickly. They had always been extremely painful, and she also had digestive symptoms that reliably worsened around her cycle, both of which she had mentioned to doctors over the years and been told were normal. When we connected those patterns and I encouraged her to seek a specialist evaluation with someone who specifically looks for endometriosis, she finally got answers. Endometriosis was likely contributing to what had been labelled unexplained for years.
She was not broken. She had simply not been looked at closely enough.
What You Can Do Right Now
If any of this is resonating, I want you to know a few things.
You are not being dramatic, too sensitive, or delusional. Your body has been communicating with you for a long time, and the fact that those signals were dismissed by someone else does not make them less real or less worth investigating.
Start tracking your symptoms in detail, not just your period pain but your digestive symptoms, your energy levels, and your pain timing. Note when things start, when they peak, and when they ease, because that information is clinically valuable and will help any practitioner you see build a much clearer picture.
Ask specifically about endometriosis. If you have had a standard ultrasound that was clear, that does not rule it out, because a specialist assessment including a transvaginal ultrasound with someone trained in endometriosis imaging, or a diagnostic laparoscopy, are the tools that actually find it.
And do not accept "normal" as a final answer when something in your body continues to feel wrong.
A Note on Chinese Medicine
From a Chinese medicine perspective, symptoms like severe cramping, dark clotted blood, pain that responds to heat, and digestive disruption around the cycle are patterns that tell us something meaningful about circulation and inflammation in the pelvis. They are not things to manage indefinitely but signs that the body needs support.
We will be going deeper into this in next week's content, but for now, if you are looking for a place to start, I have put together a guide that covers the signs commonly associated with endometriosis, including the ones that most often go unrecognised.
Download it below. It is a useful tool whether you are in the early stages of investigating your symptoms or already deep in a fertility journey and wondering if something has been missed.
Download the Endometriosis Signs Guide
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