Ovarian Cysts vs Endometriosis: How to Tell the Difference and When to Seek Help
Pelvic pain, bloating and painful periods can have several causes. Learn how ovarian cysts and endometriosis differ, how they are diagnosed and when to seek specialist care.
Pelvic pain, bloating, painful periods and discomfort during intercourse can sometimes make it difficult to understand what is happening inside your body.
Two conditions that may cause overlapping symptoms are ovarian cysts and endometriosis. Although they can be related, they are not the same condition. Their diagnosis and treatment may differ.
At Gynaeaesthetics London, Consultant Gynaecologist Mr Mohammad Masood provides personalised assessment and care for women's health concerns.
What Is an Ovarian Cyst?
An ovarian cyst is a fluid-filled sac that develops within or on the surface of an ovary.
Ovarian cysts are common, particularly during the reproductive years. Many are harmless and disappear naturally without treatment.
Some cysts may become larger, cause discomfort or require further investigation.
Common Types of Ovarian Cysts
- Functional cysts: Develop during the menstrual cycle and often resolve naturally.
- Dermoid cysts: Usually benign growths containing different types of tissue.
- Cystadenomas: Cysts that develop from cells on the surface of the ovary.
- Endometriomas: Ovarian cysts associated with endometriosis.
Learn more about ovarian cyst diagnosis and treatment in London.
What Is Endometriosis?
Endometriosis is a long-term condition in which tissue similar to the lining of the womb grows outside the uterus.
It may affect the ovaries, fallopian tubes, pelvic lining, bladder or bowel.
Endometriosis can cause inflammation, scarring and pain, although symptoms vary considerably between individuals.
Unlike many functional ovarian cysts, endometriosis does not typically disappear after a few menstrual cycles.
Ovarian Cysts vs Endometriosis: Key Differences
| Feature | Ovarian Cysts | Endometriosis |
|---|---|---|
| What it is | A sac or growth on or within an ovary | Tissue similar to the womb lining growing outside the uterus |
| Pelvic pain | May cause one-sided pain | Often period-related or persistent pain |
| Menstrual symptoms | Sometimes painful or irregular periods | Frequently painful periods |
| Bloating | May occur with larger cysts | May fluctuate during the menstrual cycle |
| Fertility | Most simple cysts do not affect fertility | May affect fertility in some women |
| Treatment | Monitoring or surgery when indicated | Pain management, hormonal treatment or surgery |
These are general differences and cannot confirm a diagnosis. An endometrioma is an ovarian cyst caused by endometriosis, so both conditions may occur together.
6 Symptoms That May Help Identify the Difference
1. Pelvic Pain
An ovarian cyst may cause discomfort on one side of the lower abdomen, particularly if it becomes large, bleeds or ruptures.
Endometriosis may cause pain before or during menstruation, although discomfort can occur throughout the month.
Learn about pelvic pain assessment and treatment.
2. Painful Periods
Painful periods are commonly reported by women with endometriosis.
Some experience cramps severe enough to interfere with daily activities, sleep or work.
Ovarian cysts can also cause menstrual discomfort, but many functional cysts produce no symptoms.
3. Bloating and Abdominal Pressure
Both conditions may cause bloating. Larger ovarian cysts can create a feeling of abdominal fullness.
Women with endometriosis may experience bloating that becomes more noticeable around menstruation.
Persistent bloating, particularly when accompanied by feeling full quickly, appetite changes or urinary symptoms, should be medically assessed.
4. Pain During Sexual Intercourse
Deep pain during intercourse can occur with endometriosis. Certain ovarian cysts may also cause discomfort during sex.
Other causes include pelvic floor conditions and vaginismus.
5. Bowel and Bladder Symptoms
Endometriosis affecting areas near the bowel or bladder may cause pain during bowel movements or urination.
Large ovarian cysts may press against surrounding organs, contributing to urinary frequency or bowel discomfort.
6. Difficulty Becoming Pregnant
Most simple ovarian cysts do not prevent pregnancy.
Endometriosis may affect fertility through inflammation, scarring or changes to pelvic anatomy.
However, many women with endometriosis conceive naturally.
Can You Have Ovarian Cysts and Endometriosis Together?
Yes. Some women with endometriosis develop ovarian endometriomas, sometimes called chocolate cysts.
These cysts contain old blood and may be identified during ultrasound.
Not every endometrioma requires surgery. Treatment decisions depend on cyst size, appearance, symptoms and fertility plans.
How Are Ovarian Cysts and Endometriosis Diagnosed?
Medical History
Your gynaecologist will discuss the timing, severity and location of pain, menstrual symptoms and medical history.
Pelvic Ultrasound
Ultrasound can identify many ovarian cysts and assess their size and appearance.
Specialist ultrasound may also detect endometriomas and some forms of deeper endometriosis.
A normal ultrasound does not rule out endometriosis, particularly superficial disease.
MRI Scanning
MRI may be recommended when deeper endometriosis is suspected or further imaging is required.
Laparoscopy
Laparoscopy is a minimally invasive surgical procedure allowing direct examination of pelvic organs.
It may be considered when symptoms persist, imaging is inconclusive or surgical treatment is appropriate.
Treatment Options: What Happens After Diagnosis?
Treatment for Ovarian Cysts
Treatment depends on the cyst type, size, ultrasound appearance, symptoms and the patient's age.
- Monitoring with repeat ultrasound
- Appropriate pain relief
- Further imaging or investigations
- Laparoscopic cyst removal when indicated
Treatment for Endometriosis
Management may include:
- Pain-relieving medication
- Hormonal treatments
- Individualised symptom management
- Laparoscopic surgery in selected cases
- Fertility-related counselling
Explore private endometriosis treatment and ovarian cyst management.
When Should You Seek Urgent Medical Attention?
Seek urgent assessment if you develop:
- Sudden, severe pelvic pain
- Pelvic pain with vomiting or fainting
- Significant dizziness or weakness
- Severe pain when pregnancy is possible
These symptoms may indicate ovarian torsion, significant bleeding from a ruptured cyst or ectopic pregnancy. Ovarian torsion requires emergency care. Do not wait for a routine appointment.
Why Choose Gynaeaesthetics London?
Understanding persistent pelvic pain can be challenging when different gynaecological conditions produce similar symptoms.
At Gynaeaesthetics London, Consultant Gynaecologist Mr Mohammad Masood provides personalised assessment for ovarian cysts, endometriosis and other women's health concerns.
Explore the clinic's gynaecology services for further information.
Frequently Asked Questions
Can ovarian cysts turn into endometriosis?
No. Ordinary ovarian cysts do not turn into endometriosis. However, endometriosis can cause ovarian cysts called endometriomas.
Is endometriosis more serious than an ovarian cyst?
The seriousness depends on the individual condition. Many cysts are harmless, while some require urgent treatment. Endometriosis can cause persistent pain and fertility difficulties.
Can ultrasound distinguish ovarian cysts from endometriosis?
Ultrasound can identify many ovarian cysts, including endometriomas, and some forms of deeper endometriosis. However, superficial endometriosis may not be visible.
Does every ovarian cyst require surgery?
No. Many simple ovarian cysts resolve naturally. Surgery depends on symptoms, cyst characteristics, size and other clinical factors.
Can endometriosis cause ovarian cysts?
Yes. Endometriosis can cause ovarian endometriomas, which are cysts associated with the condition.
Can I become pregnant with an ovarian cyst or endometriosis?
Yes. Many women with these conditions conceive naturally. The effect on fertility depends on the type and severity of the condition and other individual factors.
Book a Private Gynaecology Consultation in London
Experiencing persistent pelvic pain, painful periods, bloating or concerns about ovarian cysts or endometriosis?
Seek personalised assessment from Consultant Gynaecologist Mr Mohammad Masood.
Enquire About an AppointmentMedical disclaimer: This article provides general educational information and does not replace professional medical advice, diagnosis or treatment.