Endometriosis and Sexual Pain: Evidence, Diagnosis and Choices

Endometriosis affects an estimated 190 million reproductive-age women worldwide. Learn what the numbers mean, why normal scans can mislead and how to seek care.

What 190 million means and what it does not

The World Health Organization estimates that endometriosis affects about 10% of reproductive-age women worldwide, approximately 190 million people. This is a population estimate, not a claim that one in ten people with pelvic pain have the condition. It is also not a precise measure of a local clinic or of a particular age group. Nevertheless, the scale matters: endometriosis is not a rare curiosity, and its effects on health, work, fertility and sexual wellbeing should be taken seriously.

WHO describes a chronic condition with no current cure and symptoms that can include severe period pain, chronic pelvic pain, infertility, heavy bleeding and pain during intercourse or bowel movements. Not everyone has the same symptom pattern. Some people have significant disease with unusual symptoms; others have pain caused by something different. Population prevalence explains why healthcare systems need diagnostic pathways, but the individual deserves an assessment rather than a label assigned by an article.

The crucial clinical fact about a normal scan

NICE guideline NG73 says clinicians should not exclude endometriosis when a pelvic examination or ultrasound is normal. This is particularly important because superficial disease can be harder to identify on imaging than ovarian endometriomas or deep endometriosis. A negative ultrasound therefore does not always close the question. Equally, a normal scan may still be useful because it helps evaluate other possible explanations and decide what additional steps make sense.

The updated guidance recommends offering transvaginal ultrasound to people with suspected endometriosis, even where the examination is normal, and considers transabdominal ultrasound when an internal scan is unsuitable or declined. An ultrasound is part of the work-up, not a verdict about whether pain is genuine. Specialist expertise and clinical context influence how the findings are interpreted. Patients can ask what a scan was intended to detect and whether unresolved symptoms justify referral.

Why the symptoms cannot be reduced to period pain

Endometriosis is frequently discussed as unusually painful menstruation. That is only one potential dimension. WHO notes chronic pelvic pain, painful sexual intercourse and impacts on urination or bowel movements. A person may find that intimacy is uncomfortable at particular times or with particular activities. Another may develop a pattern of anticipating pain, which changes how they respond to affectionate touch. None of these symptoms indicates a lack of love or effort.

Partners sometimes become stuck arguing about whether the person can safely resume sex. The correct question is not how to push past pain, but how to investigate symptoms and respect physical boundaries. Stop activities that hurt. Ask which forms of closeness are comfortable. Do not treat a doctor’s reassurance about one investigation as permission to disregard symptoms. A relationship can discuss desire and compatibility while still prioritising healthcare.

NICE guidance on referral

NICE recommends referral to a gynaecology service when initial treatment is ineffective, not tolerated or contraindicated, where symptoms affect daily activities, or where persistent or recurring symptoms suggest endometriosis. Specialist pathways may be appropriate for ovarian endometriomas, deep endometriosis or disease outside the pelvis. These details matter because a patient who is told only to use painkillers indefinitely may not understand that persistent impact is itself relevant to referral decisions.

An appointment becomes more productive with a symptom history: dates, intensity, whether pain occurs during sex or bowel movements, whether it disrupts work, and which treatments have been tried. The point is not to prove suffering on a scale invented online. It is to give clinicians relevant evidence about the pattern and its effect. Ask what happens if the first approach does not work, and how referral decisions will be reviewed.

Imaging, laparoscopy and uncertainty

NICE recommends considering specialist imaging when deep endometriosis is suspected and allows diagnostic laparoscopy in selected circumstances even if imaging is normal. Surgery is an individual clinical decision, not a mandatory first step for every person with symptoms. It carries risks and potential benefits, and management can depend on pain, fertility priorities and previous treatment. A negative finding on one test should be discussed in context rather than treated as proof that the symptoms were imagined.

People often encounter absolute claims online: that only surgery can diagnose the condition, or that a scan can reliably exclude it. Neither is a sound universal summary of the updated guidance. Some forms of disease are visible on specialist imaging and some are not. A treating team can explain the diagnostic choices and limitations. Informed consent applies to internal examinations and procedures as much as to sexual activity; people can ask questions and discuss alternatives.

Fertility concerns and treatment choices

Endometriosis may affect fertility for some people, but a diagnosis does not mean pregnancy is impossible. Treatment priorities may differ between someone seeking pregnancy and someone primarily seeking pain relief. Decisions around medication and surgery can change when fertility matters. NICE explicitly addresses these different priorities. A partner should not assume that treatment choices are merely about restoring intimacy or that the person with the condition must prioritise reproduction.

In some relationships, fertility and pain become intertwined emotionally. One person may be worried about a future family, while the other is focused on making daily life tolerable. Both concerns can be discussed, but the patient retains authority over healthcare decisions. Asking a specialist what evidence applies to an individual is more useful than treating a population figure as a personal fertility prediction.

How to judge treatment claims

Treatment may include pain management, hormonal approaches and in some cases surgery, depending on the patient and clinical assessment. WHO states there is no current cure. Therefore an article selling a guaranteed permanent fix contradicts authoritative guidance. Even promising early research must be distinguished from demonstrated patient outcomes. A laboratory result, animal experiment or small uncontrolled study is not a treatment proven safe and effective for everyone.

Readers should ask what comparison group was used, whether benefits were reported by patients, how long follow-up lasted and what adverse effects were measured. A clinician can help interpret treatment choices. Public enthusiasm for a potential discovery is understandable, but a trustworthy publication should not imply that hope is an approved medical intervention. Personal stories are informative about experience, not sufficient evidence of general efficacy.

Relationship communication during unpredictable symptoms

Symptoms can fluctuate in ways that make plans difficult. A partner may feel disappointed about a cancelled trip, but frustration should not turn into disbelief. Couples can establish alternatives such as a quieter date or permission to postpone without extensive justification. Shared practical work may reduce stress, although it cannot be prescribed as a cure for inflammatory disease. Discuss what comfort, affection and privacy mean on a difficult day.

Some people want their partner to attend appointments; others prefer to speak privately. The patient decides. If a partner feels that reduced sex is a personal rejection, that feeling can be addressed separately from the medical issue. Both adults should be free to talk about the relationship, but neither should treat pain as a negotiable inconvenience. Trust grows when the person experiencing symptoms is believed even when the diagnosis remains uncertain.

How a normal ultrasound becomes misleading in everyday conversation

Someone returns from an ultrasound appointment and hears that nothing significant was seen. Their partner interprets this as meaning the pain is unexplained and therefore probably minor. NICE explicitly warns against excluding endometriosis on the basis of normal ultrasound or examination. The result may still be useful because it can identify some forms of disease and other pelvic conditions. The clinical next step depends on persistent symptoms and examination findings. Readers should ask what the scan was designed to detect, whether specialist imaging is appropriate and how symptoms will be managed while awaiting further review. A normal report should not become ammunition in a relationship disagreement.

What should a useful symptom diary contain?

A simple record can include dates, pain location, severity, links to menstrual cycles, bowel or bladder symptoms, sexual discomfort and disruption to work or sleep. It can also record medicines used and whether they helped. Avoid writing dozens of pages that a clinician cannot realistically assess; concise patterns are often more useful. The purpose is not to meet a score required for referral, but to show recurring symptoms and practical consequences. NICE highlights the impact on daily life as one factor in referral decisions. A partner may help with logistics, but should not become a monitor who questions whether the person is reporting enough pain.

Why comparing treatment stories has limits

One person may report excellent symptom relief after a particular operation, while another reports persistent discomfort. Neither personal experience reliably predicts what will happen to a new patient. Disease location, previous treatment, fertility goals and other conditions can differ. A responsible article includes patient perspectives but distinguishes them from controlled evidence and clinical recommendations. The person seeking treatment can ask about expected benefits, risks, recurrence, recovery and alternatives based on their case. Any clinician making a recommendation should explain uncertainty honestly. That is more useful than choosing a procedure because it attracted an enthusiastic online testimonial.

Pain during sex and the secondary fear of pain

When a person has repeatedly experienced discomfort, they may begin anticipating it before intimacy begins. That anticipation does not prove the condition is psychological or that the person should simply relax. It may reflect a reasonable response to past physical pain. A useful relationship conversation separates the goal of receiving healthcare from the goal of maintaining emotional connection. Partners can agree that affectionate touch will not automatically progress to painful activities. If the person wishes, a clinician or trained professional can discuss physical symptoms and the emotional effects. Neither therapeutic support nor pain treatment should be used as a means to persuade someone to consent.

The importance of specialist interpretation

NICE notes that specialist imaging can detect forms of deep endometriosis and help direct referrals, while routine scans may not identify superficial disease. This is why saying that ultrasound is useless would be just as misleading as saying it excludes the condition. Imaging is part of a larger pathway that includes symptoms, clinical assessment and sometimes further investigation. A patient can ask whether the interpreting team has relevant expertise and whether another type of evaluation would change management. The answer is individual. The key principle is that uncertainty should lead to explanation and a plan rather than dismissal.

What reliable research still cannot settle

WHO’s estimate of 190 million affected people conveys a major global burden, but it cannot tell one reader their likelihood of infertility, response to a medicine or need for surgery. Likewise, a guideline gives evidence-based options but not a guaranteed personal outcome. The strongest decision-making combines reliable population evidence with a clinician’s evaluation and the patient’s priorities. Where pain makes ordinary life difficult, the condition deserves attention even before a final diagnosis is established. Where treatment has side effects or conflicts with fertility plans, the person must be involved in weighing those trade-offs.

Can endometriosis be excluded by a blood test?

NICE advises not using CA125 alone to diagnose endometriosis. A blood result does not replace clinical assessment, imaging or referral decisions where symptoms persist. Patients may encounter online claims that a single marker can settle the problem. Ask a clinician what a test is intended to investigate and whether its result changes the plan. A result that is not diagnostic should not be framed as a verdict about pain. Accurate information can save people from an unproductive cycle of buying tests without understanding their limitations.

Does more visible disease always mean more pain?

The severity of symptoms cannot reliably be inferred from a single image or one description of lesions. A patient with disabling pain deserves assessment even when an investigation has not shown extensive disease. Conversely, the presence of endometriosis does not mean every symptom must have that cause. Other pelvic conditions can coexist. Clinical decisions should address what the patient actually experiences, including daily functioning and fertility priorities. A partner should not use a scan report to rank how much discomfort is justified.

What if an internal ultrasound is unacceptable?

NICE recommends considering transabdominal pelvic ultrasound where a transvaginal scan is declined or unsuitable. The decision should be discussed with the person, with explanation of the benefits and limitations. Someone who refuses an internal examination should not be punished by withdrawal of all care. Informed consent covers diagnostic procedures too. Readers can ask how alternative tests may affect the information available and what referral options remain. That discussion should be clinically grounded, not based on a claim that one must tolerate any procedure to be believed.

How should a partner respond to cancelled plans?

A useful response acknowledges disappointment without accusing the person with symptoms of exaggeration. Ask whether a quieter alternative is welcome, whether rest is needed and whether there are practical tasks that can be shared. Do not use help with chores as leverage for sex. Chronic pain can also influence mood and social participation; isolation may make life harder even when the person chooses to stay home on difficult days. Flexible plans should preserve agency and dignity for both people, while recognising that symptom management is a health issue.

Do dietary changes cure endometriosis?

Individual dietary choices may affect how someone feels, but broad claims that a particular restrictive diet cures endometriosis are not supported by the WHO statement that no cure currently exists. Nutrition may be part of general wellbeing and symptom management for some people, but it should not replace assessment or evidence-based treatment. Be especially wary of influencers who sell supplements or insist that non-improvement means the patient failed to follow instructions. A clinician or registered dietitian can discuss specific nutritional concerns where relevant.

What questions matter when considering surgery?

Ask which symptoms or lesions surgery aims to address, which alternatives are available, what recovery is expected, and what complications or recurrence risks should be discussed. The person may also want to know how fertility goals affect the recommendation. NICE distinguishes specialist pathways for deep disease and endometriomas. Surgery should not be presented as a generic requirement for every suspected case, nor as a guaranteed cure. A good clinical conversation acknowledges uncertainty, preferences and the possibility that pain management may require ongoing care.

What does a diagnosis change in a relationship?

A diagnosis can validate experiences and help guide care, but it does not automatically resolve tension about sex, children or household responsibilities. A couple may still need to decide how to manage uncertain symptoms and how to communicate affection without pressure. The person with the condition retains autonomy over treatment, activity and medical disclosures. A partner can be supportive while being honest about their own emotions, but should not convert those feelings into demands. The healthiest adjustment is to build trust through consistency rather than treating a diagnosis as the entire explanation for relationship dynamics.

What should happen when first-line treatment does not help?

NICE specifies referral circumstances when initial pharmacological treatment is ineffective, not tolerated or contraindicated, or where symptoms persist or substantially affect everyday activities. Patients can ask for the reasoning behind the next step and whether referral is appropriate. A clinician may also investigate other explanations for pain, because endometriosis can coexist with other conditions. The important principle is that ongoing symptoms require a plan rather than indefinite reassurance. A partner can help with appointment logistics and daily responsibilities without taking control of treatment decisions or asking the person to justify pain repeatedly.

How can someone prepare for specialist care?

Bring concise records of pain, menstrual patterns, bowel or bladder symptoms, fertility priorities, past investigations and treatments. Note how symptoms affect work, sleep and sexual comfort. Ask which form of endometriosis is being considered, what tests are useful and what outcomes different treatment options realistically offer. If surgery is discussed, ask about complications, recovery, recurrence and how the plan might affect fertility. Specialist consultations may involve difficult decisions and uncertainty. A prepared question list helps without creating the illusion that an online guide can choose the correct treatment for an individual patient.

Does endometriosis always require treatment?

The decision depends on symptoms, suspected disease, fertility goals and clinical advice. Some people require significant treatment, while others have a different balance of symptoms and preferences. A diagnosis alone does not establish that surgery is necessary or that a particular medicine must be used. WHO describes management as aiming to control symptoms and limit long-term effects because there is no current cure. Patients should understand what each intervention is expected to improve and what uncertainties remain. A strong article can explain categories of options while leaving the actual medical decision to the person and qualified clinicians.

Why trust can be affected before diagnosis

People whose pain is not explained immediately may begin to doubt their own experiences or feel that partners and clinicians regard symptoms as exaggerated. That relational burden matters even when the diagnostic pathway is still open. An appropriate response from a partner is to listen to the specific impact on daily life and accept physical boundaries, rather than making belief conditional on a scan showing a lesion. Trust is not created by declaring certainty about the diagnosis. It is created by behaving respectfully during uncertainty and supporting access to appropriate assessment.

How should claims of a breakthrough be evaluated?

A promising laboratory or early clinical finding is not a demonstrated cure. Readers should ask whether research involved human participants, whether there was a control group, how symptoms were measured, how long benefits lasted and whether adverse effects were adequately captured. Endometriosis treatments may have trade-offs, particularly around fertility or hormone-related effects. Avoid adverts that imply refusal to try an experimental product is irresponsible. The best medical reporting distinguishes current guideline-backed options from therapies still being investigated and acknowledges when researchers do not yet know the long-term outcome.

What a useful second opinion might address

Someone whose symptoms remain disruptive after an initial assessment can ask whether the proposed management is achieving its aims and whether specialist referral is appropriate. A second opinion should not be framed as proof that the first clinician was negligent, nor as a guarantee of a particular diagnosis. Bring a concise record of previous treatments, investigation results and their limitations, including any normal ultrasound. Ask whether endometriosis remains a possibility and what other conditions are being considered. The key benefit is a clear plan for persistent symptoms rather than an endless search for certainty from internet anecdotes.

Evidence at a glance

WHO estimates approximately 10%, or 190 million reproductive-age women, are affected worldwide. NICE advises against excluding endometriosis solely because a pelvic examination or ultrasound is normal.

Illustrative real-world decision

Illustrative example: A person with disabling period pain and pain during intercourse receives a normal ultrasound. Instead of concluding that everything is fine, they ask the GP what the imaging assessed, whether a specialist opinion is justified and how symptoms will be managed while waiting. Their partner agrees to avoid painful activity and helps plan more flexible social arrangements.

Editorial interpretation

Editorial assessment: The most useful correction is that neither a prevalence statistic nor a normal test result settles an individual diagnosis. Strong health reporting explains what tests can establish, what remains uncertain and which care decisions are supported by guidance.

Questions to ask and practical next steps

• What 190 million means and what it does not
• The crucial clinical fact about a normal scan
• Why the symptoms cannot be reduced to period pain
• NICE guidance on referral
• Imaging, laparoscopy and uncertainty
• Fertility concerns and treatment choices
• How to judge treatment claims
• Relationship communication during unpredictable symptoms