Chest, shoulder and breathing symptoms around the menstrual cycle should be taken seriously.
Diaphragm and thoracic endometriosis can involve the diaphragm, chest cavity, pleura or lungs. Symptoms may be cyclical, meaning they happen or worsen around a period, and some symptoms can be urgent. This does not mean every chest, shoulder or breathing symptom is endometriosis. But symptoms that follow a menstrual pattern, recur, or happen alongside known or suspected endometriosis should be assessed properly.
What diaphragm endometriosis means
The diaphragm is the large muscle that separates the chest from the abdomen and helps with breathing. Diaphragm endometriosis means endometriosis-like tissue is found on or near the diaphragm. It as a form of extra-pelvic endometriosis where tissue resembling the endometrial lining grows on the diaphragm. Some people may have no obvious symptoms. Others may have pain or breathing-related symptoms, especially around their period.
What thoracic endometriosis means
Thoracic endometriosis refers to endometriosis involving structures in the chest area. This may include:
- diaphragm
- pleura, which lines the chest cavity and lungs
- lungs
- chest cavity
- thoracic nodules in some cases
Thoracic endometriosis may be linked with symptoms such as chest pain, shoulder pain, shortness of breath, coughing blood, or a collapsed lung around the menstrual cycle.
Possible symptoms
Symptoms may include:
- cyclical shoulder tip pain
- chest pain around a period
- pain on breathing
- shortness of breath around a period
- upper abdominal pain
- rib pain
- pain under the ribs
- neck or shoulder pain
- coughing blood
- recurring collapsed lung linked with the menstrual cycle
- symptoms that are mostly one-sided, often reported on the right side
Why these symptoms are often missed
Chest, shoulder and breathing symptoms may not be immediately connected with endometriosis. They may be mistaken for:
- muscle strain
- anxiety
- asthma
- chest infection
- reflux
- gallbladder pain
- general shoulder problems
- non-specific chest pain
The pattern matters. A symptom that repeatedly appears around a period, or occurs with pelvic pain, bowel or bladder symptoms, painful sex, fatigue or known endometriosis, should be mentioned clearly to a healthcare professional.
Urgent symptoms
Chest pain, shortness of breath, coughing blood or a suspected collapsed lung should be assessed urgently. Do not wait for a routine appointment if you have:
- chest pain
- shortness of breath
- coughing blood
- sudden shoulder tip pain with breathlessness
- fainting
- blue lips
- severe pain when breathing
- symptoms of a collapsed lung
- severe sudden pain that feels different from usual
These symptoms may have causes other than endometriosis and need prompt assessment.
Diagnosis and imaging
Diagnosis may involve a careful history, symptom timing, physical examination and imaging. Depending on symptoms, clinicians may consider:
- chest X-ray for urgent chest symptoms
- CT scan or MRI in selected cases
- pelvic and abdominal MRI if diaphragm disease is suspected
- specialist gynaecological imaging
- review by endometriosis-experienced clinicians
- surgical assessment in selected cases
A normal scan does not always rule out endometriosis, so the symptom pattern and specialist review may still matter.
Specialist care
Care may need more than one specialist. Depending on the symptoms and suspected location, this may include:
- gynaecology
- specialist endometriosis surgeon
- thoracic surgeon
- respiratory specialist
- radiologist with endometriosis expertise
- pain management
- pelvic physiotherapy
- specialist nurse support
Treatment options
Treatment depends on the person, symptoms, risks, disease location, fertility goals and specialist assessment. Options may include:
- urgent treatment for acute chest symptoms
- pain relief where appropriate
- hormonal symptom management in selected cases
- specialist endometriosis review
- planned surgical treatment where appropriate
- thoracic surgical input if chest cavity or lung involvement is suspected
- follow-up care if symptoms recur
Questions to ask
You may want to ask:
- Could diaphragm or thoracic endometriosis be considered?
- Could my chest, shoulder or breathing symptoms be linked with my cycle?
- What urgent symptoms should I watch for?
- What imaging is appropriate?
- Who should interpret the imaging?
- Should I be referred to a specialist endometriosis service?
- Should thoracic surgery input be involved?
- What happens if symptoms recur?
- What treatment options are suitable for my situation?
Prepare before you speak with a healthcare professional
Use our Prepare for Appointment Tool to organise your symptoms, questions, previous treatments, scan results and priorities before your appointment. Try to record:
- when chest, shoulder or breathing symptoms happen
- whether symptoms link to your period or ovulation
- whether symptoms are one-sided
- whether symptoms happen with pelvic, bowel, bladder or fatigue symptoms
- whether you have coughing blood, breathlessness or fainting
- whether symptoms are worsening or recurring
- what emergency care or tests you have already had
You do not need a perfect diary. A clear symptom pattern can help the conversation feel more focused.
Finding the right type of care
Use the Endometriosis Care Directory to explore different types of endometriosis-related care providers. The directory is for research and information only. It is not a recommendation, referral service, ranking or medical advice. Always check details directly with the provider and speak with an appropriate healthcare professional before making decisions about your care.
Final reminder
Chest, shoulder and breathing symptoms around the menstrual cycle should not be ignored. Diaphragm and thoracic endometriosis can be complex and may need specialist assessment, sometimes involving both endometriosis and thoracic expertise. This resource is here to support your understanding, not replace medical advice from a qualified healthcare professional.