Nearly 1 in 10 women may have endometriosis. Discover the shocking truth about how common is endometriosis, the alarming teen statistics, and how to finally get real relief. 

Introduction

Have you ever curled up with a heating pad, cancelled plans because of period pain, and wondered, “Is this really normal?”

You are not alone. Endometriosis is one of the most common chronic gynecological conditions affecting women of reproductive age. The World Health Organization (WHO) estimates that about 1 in 10 women, or approximately 190 million people worldwide, live with endometriosis.

But there is a catch: many cases remain undiagnosed. So, how common is endometriosis really, how many women have it, and what percentage of teens are affected?

How Common Is Endometriosis?

Endometriosis is estimated to affect about 1 in 10 women of reproductive age worldwide, making it a common chronic gynecological condition rather than a rare disease.

The current WHO estimate is strikingly large: approximately 190 million women of reproductive age live with endometriosis globally. WHO describes it as a chronic disease that can cause severe menstrual pain, chronic pelvic pain, heavy bleeding, infertility, bloating, nausea, and symptoms affecting sex, bowel movements, urination, and mental health.

So, if you have been wondering, “How common is endometriosis?”, the simplest evidence-based answer is about 1 in every 10 women of reproductive age.

But there is an important caveat. Prevalence estimates are not perfect. The number of people who have endometriosis may be considerably larger than the number who have received a formal diagnosis.

What Does “1 in 10 Women” Really Mean?

When doctors and medical organizations say endometriosis affects 1 in 10 women, they are referring to an estimated prevalence among women of reproductive age, not a worldwide registry of confirmed diagnoses.

Think of it like an iceberg. The 10% estimate represents the broader burden beneath the surface, while diagnosed cases represent the portion that healthcare systems have actually identified.

ACOG states that endometriosis occurs in “about 1 in 10 women of reproductive age.” The WHO estimate is similarly around 10%, or approximately 190 million people globally.

But the number can look lower in individual studies when researchers count only women with documented or self-reported diagnoses.

Why Endometriosis Is Difficult to Count?

There is no single worldwide database that records every person with endometriosis, and studies use different definitions, populations, healthcare records, and diagnostic methods.

Some people have symptoms but have never been diagnosed. Others may be treated based on symptoms and imaging without surgery. Still others may have few or no symptoms and therefore never seek care.

WHO highlights that symptoms can be broad and variable and says, “Long delays in diagnosis are common.”

This is why you should be cautious when comparing a global estimate with a country-specific diagnosis rate. They may be measuring different things.

How Common Is Endometriosis in the United States, UK, Canada, and Spain?

The global estimate is useful, but country-level data show how widely endometriosis affects women across different healthcare systems.

Endometriosis Prevalence in the United States

The U.S. Office on Women’s Health estimates that at least 11% of women in the United States, or more than 6.5 million women, have endometriosis.

That is millions of people living with symptoms that can affect work, relationships, daily activities, and fertility.

Endometriosis Prevalence in the UK and Canada

In the UK, Endometriosis UK estimates that around 1.5 million people are living with endometriosis and uses the familiar estimate of 1 in 10.

Health Canada similarly states that endometriosis affects approximately 1 in 10 girls and women of reproductive age.

Across the U.S., UK, and Canada, one message stands out: endometriosis is common, not rare.

How Common Is Endometriosis in Spain?

Spanish data are especially interesting because researchers have used large healthcare databases to study diagnosed diseases.

One nationwide Spanish study examined more than 12.7 million women aged 15–54 and reported a diagnosed incidence of 16.1 cases per 10,000 women between 2014 and 2017. The rate varied across regions, reaching 24 per 10,000 in the Valencian Community.

For someone seeking specialist endometriosis care in Valencia, that regional finding is particularly relevant.

Why Spanish Diagnosed Rates Cannot Be Compared Directly With the Global 10% Estimate

This distinction is important.

The Spanish study measured diagnosed cases recorded in healthcare data, while WHO’s 10% figure is an estimated global prevalence. They are not measuring exactly the same thing.

A lower diagnosed rate, therefore, does not mean that endometriosis is uncommon in Spain. Undiagnosed disease, differences in healthcare access, and study methods can all influence recorded rates.

What Percentage of Teens Have Endometriosis?

Teenagers can have endometriosis too. In fact, symptoms may begin soon after menstruation starts, even though the condition is often associated with adulthood.

The important point is that we do not have a reliable percentage for all teenagers.

The Teenage Struggle We Aren’t Talking About

A systematic review of adolescents undergoing laparoscopic investigation for dysmenorrhea or chronic pelvic pain found endometriosis in 62% overall. Rates reached 70% in adolescents with dysmenorrhea and 75% in those with treatment-resistant chronic pelvic pain.

But please don’t interpret that as “62% of all teenagers have endometriosis.”

These were highly selected, symptomatic adolescents already undergoing investigation. The researchers specifically cautioned that such studies can overestimate prevalence in the general teenage population.

Why Early Intervention Matters?

Severe period pain can be dismissed as something a young woman simply has to tolerate. That assumption can postpone evaluation when treatment or specialist assessment could be appropriate.

Endometriosis UK has highlighted the importance of helping teenagers distinguish between expected menstrual discomfort and pain that warrants further assessment.

Early attention does not mean every teenager with painful periods has endometriosis. It means persistent, severe, or disabling symptoms deserve to be taken seriously.

ACOG’s current 2026 clinical practice guideline specifically covers the diagnosis of endometriosis in adolescents and reproductive-aged adults with symptoms suggestive of the disease, reinforcing that adolescent endometriosis belongs within modern diagnostic care rather than being treated as an adult-only problem.

Why Is Endometriosis So Often Missed or Diagnosed Late?

Endometriosis can be common and still go unnoticed for years. The symptoms often overlap with other conditions, while severe menstrual pain is still too easily normalized.

The Myth That Severe Period Pain Is “Normal”

Mild menstrual discomfort is common. Pain that repeatedly stops you from living your life is different.

If your period means missed work, missed school, sleepless nights, cancelled plans, or repeated reliance on strong pain relief, it is reasonable to ask whether something more is happening.

How Symptoms Overlap With Other Conditions

Endometriosis can resemble several other disorders, including:

• Irritable bowel syndrome
• Adenomyosis
• Fibroids
• Ovarian cysts syndrome
• Pelvic inflammatory disease
• Bladder or pelvic floor disorders

For example, bowel endometriosis may cause bloating, constipation, diarrhea, or painful bowel movements, particularly around menstruation.

This overlap can make diagnosis feel like a puzzle.

Who Is Most Likely to Develop Endometriosis?

Endometriosis can affect anyone who menstruates, but certain factors may increase the likelihood.

These include:

• A family history of endometriosis
• Severe or persistent menstrual pain
• Shorter menstrual cycles
• Longer periods
• Chronic pelvic pain
• Infertility or unexplained fertility problems

The U.S. Office on Women’s Health identifies family history and certain menstrual characteristics among recognized risk factors.

Still, risk factors are clues — not a diagnosis.

What Symptoms Should Make You Suspect Endometriosis?

Endometriosis should be considered when these symptoms are persistent, severe, or closely linked with the menstrual cycle.

Watch for:

• Severe period cramps
• Chronic pelvic pain
• Pain during or after sex
• Painful bowel movements
• Urinary pain or symptoms
• Bloating or digestive changes
• Heavy bleeding
• Persistent fatigue
• Difficulty becoming pregnant

You do not need to have every symptom. Endometriosis can look very different from one person to another.

The Tangible Impact on Quality of Life and Fertility

Endometriosis is much more than painful periods.

It can affect work, education, exercise, relationships, sexual health, mental well-being, and fertility. WHO recognizes impacts on sexual health, bowel and bladder function, and reproductive health.

Fertility is particularly important. Having endometriosis does not mean pregnancy is impossible, but the disease can be associated with infertility and may influence how reproductive plans are managed.

That is why treatment decisions should consider not only pain relief, but also age, ovarian health, disease location, and future fertility goals.

From Diagnosis to Relief: How Is Endometriosis Treated?

There is no single endometriosis treatment that works for everyone. Management depends on symptoms, disease location, treatment history, and whether pregnancy is a current or future goal.

Standard Treatments vs. Surgical Solutions

Common approaches may include:

• Pain-relieving medication
• Hormonal contraceptives
• Progestin-based treatments
• GnRH-based therapies
• Surgical treatment when appropriate

Surgery may be considered when symptoms remain difficult to control, when deep endometriosis or endometriomas are present, or when anatomy and fertility require a more targeted approach.

The goal is not simply to “remove everything.” It is to balance symptom relief, disease control, safety, and preservation of reproductive potential.

The Role of Excision Surgery and Fertility Preservation

When surgery is appropriate, excision involves removing visible endometriosis lesions rather than simply treating symptoms.

In complex disease, the surgeon may need to work around the bowel, bladder, ureters, ovaries, and other pelvic structures. When ovarian endometriomas are involved, preserving healthy ovarian tissue can also be an important consideration.

That is why complex endometriosis often requires highly individualized surgical planning.

Excellence in Excision Surgery with Dr. Lucas Minig

This is not a surgery you want your standard, local OB-GYN to perform. It requires the hands of a master specialist. Enter Dr. Lucas Minig, a globally recognized Gynecologic Oncologist and specialist in high-complexity, minimally invasive surgeries.

With deep expertise honed at the National Cancer Institute (USA) and the European Institute of Oncology (Italy), Dr. Minig approaches endometriosis with the exactness of an oncologist removing a tumor. He and his multidisciplinary team don’t just treat your symptoms; they treat the whole woman. Remarkably, over 95% of his procedures are performed using advanced laparoscopic or robotic techniques. This means less pain, minimal scarring, and drastically faster recovery times. And best of all? His private clinic operates with a strict no-wait-list policy.

Your International Destination for Relief: Valencia, Spain

For patients traveling from the U.S., UK, Canada, or other countries, seeking complex endometriosis care abroad can involve more than choosing a surgeon.

Dr. Minig’s practice offers teleconsultations and international-patient support, including assistance with travel logistics and care coordination in Valencia. 

For someone exhausted by prolonged symptoms, repeated consultations, or local waiting lists, an initial remote consultation can provide an opportunity to understand the available treatment options before deciding whether travel is appropriate.

The decision should always be based on medical need, expected benefits and risks, cost, follow-up arrangements, and your individual circumstances.

Conclusion

So, how common is endometriosis? It is common enough that millions of women are suffering in silence right now. From teenagers navigating the terrifying onset of debilitating pain, to women in their 30s fighting for their fertility, the global statistics are a loud call to action.

You do not have to accept a life of chronic pain. You do not have to settle for hormonal Band-Aids or sub-par ablation surgeries from doctors who don’t specialize in this highly complex disease. Whether you live in London, Toronto, or New York, elite medical care is accessible. By crossing borders and placing your trust in globally recognized experts like Dr. Lucas Minig in Valencia, Spain, you are taking a definitive, powerful step toward true healing. You deserve relief—and an individualized plan that actually works.

FAQs

How many women have endometriosis?

WHO estimates that around 190 million women of reproductive age worldwide have endometriosis, or approximately 1 in 10.

Is endometriosis considered a rare disease?

Not at all. Endometriosis is incredibly common, affecting roughly 10% (around 190 million) of women and individuals assigned female at birth globally. It is roughly as prevalent as diabetes.

Can teenagers really get endometriosis?

Yes, absolutely. It is a major misconception that this is only an adult disease. Among teens with chronic, severe pelvic pain that doesn’t improve with endometriosis medication, up to 73% are found to have endometriosis.

Why should I travel to Spain to see Dr. Lucas Minig for my surgery?

General gynecologists often lack the highly specific training required to properly excise (cut out) deep infiltrating endometriosis, leading to high recurrence rates. Dr. Lucas Minig is a highly specialized, internationally trained surgeon utilizing advanced robotic and laparoscopic excision techniques. Traveling to his clinic in Valencia offers rapid access to world-class care, fertility-preserving expertise, and a dedicated international concierge service.

What is the difference between ablation and excision surgery for endometriosis?

Ablation simply burns the surface of the endometrial tissue, often leaving the deeper “roots” of the disease behind, which leads to a quick return of pain. Excision surgery, which is the gold standard performed by experts like Dr. Minig, carefully cuts out the entire lesion from the root, providing much better, long-lasting relief.