Symptoms & Diagnosis
Know the signs of Endometriosis
Early awareness can make a life-changing difference. Learn to identify signs, track symptoms, and know when to seek medical help
Why it matters
Common Symptoms Of Endometriosis
Endometriosis affects an estimated 1 in 10 women and people assigned female at birth, but it’s often underdiagnosed. Knowing the symptoms helps you advocate for timely care.
Pain
Severe menstrual cramps (dysmenorrhea): Pain that begins before your period and extends several days into
Bleeding
Heavy periods (menorrhagia): Soaking through pads/tampons every couple of hours.
Digestive & urinary
Painful bowel movements or urination, especially during periods.
Important note Many of these symptoms overlap with conditions like IBS (Irritable Bowel Syndrome) or ovarian cysts. Keeping a symptom diary helps your doctor pinpoint what’s really going on.
Commonly reported symptoms
If you have, or suspect that you have, endometriosis, you may experience one or more of the following. You should always bear in mind that experiencing these symptoms does not mean that you have endo, but equally, not having one or most of these does not rule it out.
As a neuroinflammatory multisystem disease, endometriosis is complex, involving interactions between many of the systems within your body, so symptoms are not always going to be ‘textbook’.
Some of the most commonly reported symptoms of endometriosis include:
- Fatigue/lack of energy – this is an interesting one. Fatigue is reported by around 90-95% of people with endometriosis, but it’s not the biggest thing that many people see as a red flag. Fatigue is common in all kinds of chronic illness, and so would not lead to a diagnosis on its own. That being said, it’s one of the most debilitating symptoms and can greatly impact quality of life. No, we’re not just tired!
- Abdominal/pelvic pain – along with dysmenorrhea (painful periods), this is probably one of the symptoms we most often connect with endo, though unlike painful periods, it’s one that makes diagnosis tricky. There is a prevailing belief that pain has to be associated with your cycle, that it can’t occur everyday throughout your cycle and this can make diagnosis difficult/prolonged. It’s simply not true. Whilst pain may be elevated around your period, it can and does occur every day. It’s important to note here that whilst pain is frequently reported in cases of suspected endometriosis, you can have endo and not be in pain. Pain is also not directly associated with severity or stage of the disease.
- Painful periods (dysmenorrhea) – this refers specifically to the pain that is related to your cycle. For many endo warriors, the pain will progress in the few days running up to their period and taper off as their period progresses, usually peaking around the second day. This is similar to the usual presentation of period pain, but is likely to be much more painful than ‘normal’ period cramps. As with any other symptom though, this is not always the case – some of us have pain throughout the entire period and possibly after.
- Bloating – the dreaded endo-belly. This one is not only likely to be uncomfortable and potentially painful, but also wreaks havoc on our self-esteem. Primarily caused by inflammation and hormonal activity, it can also be triggered by certain foods or drinks. Many sufferers report embarrassment and issues with body image, and it can be particularly difficult for those struggling with infertility – looking and feeling 5 months pregnant is the last thing you want. It’s key to remember that whilst certain dietary and lifestyle changes may reduce swelling and inflammation, endo-belly is not the same as ‘weight gain’ and dangerous or extreme dieting is not the answer. Your overall health comes first.
- Abnormal periods or changes to your period – this isn’t always going to be a change – some women and girls struggle from their very first period. However, it’s hard to know what is and isn’t normal when we have no frame of reference. What makes this harder is the embarrassment that comes with talking about our periods when they are so new to us, and the tendency for us to be brought up believing that periods are painful and terrible experiences. Noticing changes is possibly an easier metric for some as your symptoms progress. Either way, there are some key characteristics of your period that may indicate endo;
- Heavy bleeding – ‘heavy’ for one person may be ‘light’ to another so this is a tough one if your flow has always been heavy, but you certainly know if your periods gradually become heavier. There are also objective indications of what is ‘heavy’ enough to warrant concern, for instance, if you soak through a pad or tampon within an hour or two, this is likely to be a cause for concern. You may also pass large clots.
- You may have spotting between periods, and pain around ovulation – this may feel like period cramps or could be a sharper more intense pain.
- They last longer than is typical – usually more than 5-7 days that is typically expected (a normal cycle is generally somewhere around 3-7 days). Some people with endo do also experience shorter or less frequent periods.
- They are irregular and unpredictable – this could be more than once a month or less than, and it may vary in flow from period to period. It may waver only slightly from the 21-35 day cycle length and be hard to spot, so tracking your periods is important in identifying irregularities.
Types of pain
It’s probably worth giving pain some more specific focus as it can be present in many different ways.
The following list comprises some of the more common locations, triggers and varieties of pain, but is by no means exhaustive and these symptoms do not mean that you have endometriosis when taken in isolation. Any unexplained pain should be taken seriously.
- Dysmenorrhea (Painful Periods)
- Severe menstrual cramps that begin before and extend beyond menstruation
- Often described as stabbing, burning, or cramping pain
- Chronic Pelvic Pain
- Persistent pain in the lower abdomen or pelvis, not necessarily linked to menstruation
- Can be dull, aching, or sharp
- Dyspareunia (Pain During or After Sex)
- Deep pelvic pain during intercourse, especially with deep penetration
- Often linked to deep infiltrating endometriosis
- Dyschezia (Painful Bowel Movements)
- Pain during defecation, especially around menstruation
- May be caused by lesions on the bowel or rectum
- Dysuria (Painful Urination)
- Pain or discomfort when urinating, especially during menstruation
- Can be due to bladder involvement
- Lower Back and Leg Pain
- Radiating pain from the pelvis to the lower back, hips, and legs
- May involve sciatic nerve compression (sciatic endometriosis)
- Abdominal Pain and Bloating (“Endo Belly”)
- Swelling and discomfort in the abdomen, often unrelated to food intake
- Can be cyclic or constant
- Shoulder and Chest Pain
- Rare but possible if endometriosis affects the diaphragm or pleura
- Often occurs during menstruation
Endometriosis and infertility
Endometriosis does not always mean infertility, but it can make conceiving difficult. Affecting around 30 – 50% of those of us with endo, it’s likely one of the factors that causes the most distress or gets the most attention.
In asymptomatic cases, investigation of infertility can lead to an eventual diagnosis, with endo being 8-10 times more common in infertile individuals than in the general population.
There are several reasons why endo may cause infertility:
- Scarring and adhesions that distort pelvic anatomy and block reproductive pathways
- Inflammation that damages eggs, sperm, and embryos
- Hormonal imbalances that disrupt ovulation and implantation
- Immune system dysfunction that may attack sperm or embryos
- Endometriomas (ovarian cysts) that reduce egg quality and ovarian reserve
Other symptoms and associated issues
These may be less common or at least less commonly associated with endometriosis, but are still potentially part of the picture for you.
Difficulty in diagnosing can be a result of some of these outlying symptoms, especially when the misconception that endo is a gynaecological disease is still so widespread, even in the medical community.
- Pain can involve nerves (neuropathic pain), and may feel like a tingling or burning sensation. This can be caused by inflammation around the nerves or compression of nerves due to inflammation of surrounding structures, but can also be a result of direct endometriotic lesion growth on the nerves themselves, particularly on major pelvic nerves. This can be difficult to associate with endometriosis as it may not follow the pattern of your cycle and doesn’t not always stay/appear within the pelvis.
- Back/hip pain – there are many reasons why endo may cause back pain. This could be due to the location of the lesions but can also be a result of changes in your activity levels as well as things you need to do to be comfortable – sleeping in a ball, constantly leaning on things.
- Brain fog – the impact that endo has on your cognitive function are becoming increasingly recognised. These can have an impact on your day to day life as you become increasingly frustrated, exhausted and potentially struggle with depression. Brain fog may look like lapses in memory and difficulty focusing. You may feel sluggish and struggle to maintain attention or become easily distracted. It may even cause executive dysfunction, making decision-making more difficult, impacting your ability to plan and problem-solve, and result in slower learning. Chronic pain has a lot to answer for in contributing to cognitive issues, along with hormonal dysregulation and ongoing fatigue.
Endometriosis can impact many organs within the body, so a full list of symptoms would be impossible to pull together, but there may be:
- Gastrointestinal/bladder issues if the gut or bladder are involved, rectal bleeding, heartburn and acid reflux linked to tissue on the bowel or stomach. This can lead to endo frequently being misdiagnosed as either a gastrointestinal issue, bladder issue or UTI.
- Endometriosis can cause heightened sensitivity to pain and skin irritability.
- Other systemic issues can include shortness of breath and chest pain if thoracic endo is present, migraines, allergies, immune dysfunction.
Further reading
- Biology of Reproduction – Oxford Academic
Endometriosis as a neuroinflammatory multisystem disease - JAMA Network – Endometriosis: A Review
Comprehensive overview of symptoms, diagnosis, and treatment - IntechOpen – Decoding Endometriosis
Exploration of under-recognized symptoms and diagnostic delays - MDPI – International Journal of Molecular Sciences
Pathophysiology and rare manifestations of endometriosis
- Endometriosis In America Survey (2021)
Symptom prevalence and patient-reported experiences - Mayo Clinic
Comprehensive symptom list and clinical guidance
As well as the literature listed here, you can also take a look at some of our real stories, if comparing real life experiences may feel more relevant to you.
Tracking Symptoms
How to Track Your Symptoms

Why tracking helps
Doctors often rely on your history. By documenting your pain and other issues, you give them a clearer roadmap, speeding up diagnosis.
- Write down what you feel each day. Include pain location, intensity (1-10 scale), how long it lasted, and anything that made it better or worse.
- Apps like Clue, Flo, or Endometriosis Diary let you log symptoms, mood, bowel habits, and medications.
- Are certain days always worse? Does it get bad after certain foods? Does sex trigger pain?
- Are you missing work or school? Cancelling social plans? These notes are important.
Diagnosis — What to Expect
There is no simple blood test for endometriosis. It’s often a process of ruling out other conditions, and it often takes 7-10 years for a diagnosis. But being informed helps you advocate for yourself.
Medical history
Your doctor will ask detailed questions about your cycles, pain, bowel/bladder issues, and how it affects daily life.
Pelvic exam
They’ll feel for cysts or tender areas. This can sometimes indicate endometriosis or related conditions.
Imaging tests
Ultrasound and MRI Helps detect ovarian cysts (endometriomas) but doesn’t show all endo.
Laparoscopy
A minimally invasive surgery where a camera looks inside your abdomen.
Comfort note You have the right to ask questions, get second opinions, and discuss treatment options that respect your life goals (like fertility).
When to Talk to Your Doctor
Ask yourself:
- Is your period pain severe enough to disrupt work, school, or daily life?
- Do you have pain with sex or bathroom trips that others brush off as “normal”?
- Are you dealing with chronic fatigue that you can’t explain?
- Are you trying to get pregnant without success?
If yes to any of these, it’s time to talk to a gynecologist or an endometriosis specialist.

Mild cramps are common, but pain that makes you miss out on life is not normal and deserves medical attention.
Yes. Many start experiencing symptoms in their teens, though diagnosis often comes years later.
Hormonal treatments like birth control pills can reduce symptoms, but they don’t cure endometriosis.
Sadly, it can take years due to misdiagnosis. Tracking symptoms and being proactive shortens this journey.