If you’ve been told endometriosis is a hormonal condition, that’s not wrong, but it’s not the whole picture either. And that missing piece is often exactly why the standard advice (“try the pill,” “see how you go”) doesn’t get to the root of what’s happening.
I feel really strongly about this one, because so many women are told their pain is normal.
Endometriosis is oestrogen-dependent, yes. But at its core, it’s also an immune condition, and understanding that changes what actually helps.
In a healthy immune system, tissue that ends up somewhere it shouldn’t be, like endometrial-type tissue outside the uterus, gets identified and cleared away. In endometriosis, that surveillance process doesn’t work as it should. The tissue isn’t cleared. It implants, grows, and creates an ongoing inflammatory response in the body.
That’s the immune piece: not a malfunctioning reproductive system on its own, but an immune system that isn’t doing one of its normal jobs. Layered on top of that is the oestrogen-dependent piece. This displaced tissue responds to oestrogen the same way tissue inside the uterus does, which is why symptoms often track with the menstrual cycle.
Oestrogen is the hormone that promotes growth, including growth of this tissue. Progesterone is its calming counterpart. And one of the biggest things that pulls progesterone down is stress.
Both things are true at once. That’s why endometriosis can’t be fully addressed by hormone management alone, and it’s also why it’s not “just in your head” or “just a bad period.” There is a real, ongoing immune and inflammatory process driving it.
Endometriosis doesn’t always look like “bad period pain,” and that’s part of why it’s so often missed. Some of the most common signs I see in practice include:
You don’t need every symptom on this list for it to be worth investigating. Even a couple of these, especially if they’re cycle-linked and affecting your life, are reason enough to ask questions.
Here’s the connection that rarely gets explained: much of your immune system lives in your gut. Gut health and immune function aren’t two separate systems running side by side. They’re deeply intertwined, and the state of one has a direct impact on the other.
When the gut is inflamed, when the microbiome is out of balance, or when the gut lining is under strain, that tends to show up as more inflammation throughout the body, the same kind of inflammation that’s already raised in endometriosis. On top of that, gut bacteria play a role in how your body processes and clears oestrogen. A gut under strain doesn’t do that job as efficiently, which can mean more circulating oestrogen feeding an already oestrogen-responsive condition. Research in women with endometriosis is starting to look closely at exactly this, and Lara Briden, whose work I draw on a lot, has written a brilliant piece on the immune and gut side of endometriosis.
This is why gut support is an important part of the picture when I’m working with someone with endometriosis. Many women find that as their gut health improves, inflammation eases and symptoms become more manageable, alongside their medical care, not instead of it.
Everybody is different, and we don’t have to change everything at once. These are the foundations I come back to again and again:
And be patient with yourself. It takes around three months for a follicle to mature, so the changes you make now often show up in your cycle a few months from now.
To be clear: supporting the gut isn’t a cure, and it isn’t a substitute for medical diagnosis or treatment, including surgery where that’s needed. What it can do is address one of the underlying drivers, inflammation and immune dysfunction, that’s often left completely unaddressed by symptom management alone. Think of it as supporting the terrain the condition is growing in, alongside the care your medical team provides.
Endometriosis takes an average of several years to diagnose, largely because symptoms are so often dismissed as “just a bad period.” If what you’ve read here sounds familiar, here’s how to walk into that GP appointment better prepared:
Track before you go. Keep a simple symptom diary for 2–3 cycles: pain intensity and timing, bleeding patterns, bowel or bladder symptoms around your period, fatigue, and how much it’s affecting your daily life (missed work, cancelled plans). Specific, dated detail is much harder to wave away than “it’s really painful.”
Use clear language, not minimising language. Instead of “my periods are a bit much,” try: “My pain is a 7 out of 10, it stops me going to work, and painkillers don’t touch it.” Naming the impact on your life matters.
Ask about endometriosis by name. You can say: “I’d like to be assessed for endometriosis. Can I be referred to gynaecology?” You’re allowed to name what you suspect rather than waiting to be asked the right question.
Know that a normal ultrasound doesn’t rule it out. Endometriosis often doesn’t show on a standard scan. The recognised gold-standard diagnosis is a laparoscopy. If you’re told everything “looks normal” but your symptoms continue, it’s reasonable to ask what the next step is.
It’s okay to seek a second opinion. If you feel dismissed, you’re allowed to go back, or go elsewhere. Persistence isn’t being difficult. It’s often simply what getting diagnosed requires.
Endometriosis is a whole-body condition, immune, inflammatory and hormonal all at once, which is exactly why a whole-body approach matters alongside medical care. If you’re navigating a diagnosis, or you suspect you have endometriosis and haven’t been heard yet, please know: there’s a real, physiological reason behind what you’re feeling, and support for it exists.
I work with women online across Ireland and beyond, supporting the gut and immune foundation alongside their medical care, not to replace it, but to address the piece that’s so often left out of the conversation. For long-standing issues like endometriosis, my 12-Week Transformation gives us the time to build on strong foundations.
A note on how I work: real change doesn’t happen overnight. We start with your foundations and build from there, and there’s always more we can do as your body responds. Anything hormonal takes at least three months to shift, so the real difference comes from consistency: sticking with the changes, giving your body time on the plan (your food, your lifestyle, and herbs or supplements where they’re needed), and being patient with yourself. There’s no magic pill that will fix everything at once.
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I'm a nutritionist and registered herbalist, and I help women get to the bottom of what's going on with their hormones: painful or irregular periods, PCOS, endometriosis, coming off the pill, fertility and perimenopause. I also support mams through the postpartum years, when so much of the care stops. I work online with women across Ireland and beyond. Slowly, gently and bit by bit, so the changes actually last.
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