An ovarian cyst is a sac of fluid on or in the ovary, and most are harmless. In women who still have periods, the commonest kind - a functional cyst - usually disappears on its own within one to three cycles. Other kinds, such as dermoid cysts, endometriomas and cystadenomas, do not go away by themselves and may need to be removed if they are large, growing or painful. A small number of ovarian swellings, more often after menopause, turn out to be cancers, which is why every cyst deserves a proper assessment.
Ovarian Cyst Causes and the Kinds I See
The cause depends on the kind of cyst. Most come from the normal monthly cycle, when a follicle or the corpus luteum fills with fluid. Endometriomas come from endometriosis, and dermoids arise from the cells that form eggs. Cystadenomas are benign growths from the surface of the ovary.
| Cyst | What it is | How it behaves | My usual approach |
|---|---|---|---|
| Follicular or corpus luteum | Functional - part of the normal cycle | Goes away within 1–3 cycles | Reassurance; a repeat scan if it is large |
| Haemorrhagic | A functional cyst with bleeding inside | Can be painful; usually gone in 6–12 weeks | Pain relief and a repeat scan |
| Endometrioma ("chocolate cyst") | Endometriosis tissue filled with old blood | Stays; associated with pain and fertility problems | Medical treatment or laparoscopic cystectomy |
| Dermoid (mature teratoma) | Contains fat, hair or teeth | Grows slowly, does not go away, can cause twisting | Laparoscopic cystectomy if it causes symptoms or is growing |
| Serous or mucinous cystadenoma | A benign growth from the surface of the ovary | Can grow very large | Removal by laparoscopy |
| Complex or solid mass | A mixture of solid and fluid areas | Must be assessed for a tumour | More imaging, tumour markers, and oncology input if there is concern |
An ultrasound can usually tell these apart with good accuracy.
Ovarian Cyst Symptoms - Including Having None
Most cysts cause no symptoms at all and are found by chance on a scan done for another reason. When they do cause symptoms, these can include:
- A dull ache or a feeling of heaviness on one side of the pelvis.
- Bloating, a sense of fullness, or swelling you can see.
- Painful periods and pain during intercourse, particularly with endometriomas.
- Pressure on the bladder or bowel.
- Irregular periods, with some functional cysts.
- Sudden severe pain, if a cyst bleeds, bursts or twists.
How I Work Out What Kind of Cyst It Is
- Transvaginal ultrasound by an experienced operator is the most important test. I score the cyst's size, wall, contents and blood flow using the IOTA simple rules or O-RADS.
- Women who are not sexually active have the scan through the abdomen instead.
- Blood tests are chosen according to your age and what the scan shows.
- CA-125 is helpful after menopause. In younger women it is often raised for harmless reasons - endometriosis, fibroids, infection, or even a period.
- Girls and young women with a complex cyst may also have AFP, LDH and hCG tested.
- MRI is arranged when the ultrasound leaves questions unanswered.
- After menopause, I combine the scan score, CA-125 and menopausal status into a Risk of Malignancy Index (RMI). A score below 200 suggests low risk; a higher score means referral to a gynaecological oncology team.
Ovarian Cyst Treatment Without Surgery: Monitoring, Medicine or an Operation
Most ovarian cysts are treated without surgery, simply by watching them, because functional cysts usually go on their own. No tablet removes a cyst that is already there. The decision to operate follows clear size and scan criteria.
Before menopause (following RCOG guidance):
- A simple cyst under 5 cm usually needs no follow-up.
- A simple cyst of 5–7 cm is generally scanned again, often once a year.
- A cyst over 7 cm is usually considered for further imaging or for surgery.
- Cysts that persist, look complex or cause pain are also considered for further action.
After menopause:
- A small simple cyst with a normal CA-125 can be watched with repeat scans over a year; many resolve.
- A cyst with worrying features or a raised RMI is managed with, or by, a gynaecological oncology team.
Medicines:
- The contraceptive pill does not shrink a cyst that is already there, but it can stop new functional cysts forming in women who keep getting them.
- Dienogest helps endometriosis pain and may slow the growth of an endometrioma.
For most women with a simple cyst, what is needed is a clear explanation and, at most, one repeat scan.
Chocolate Cyst Treatment: Medicines, Surgery or Waiting
A chocolate cyst (endometrioma) is treated according to your pain, its size and, above all, your plans for pregnancy. Unlike a functional cyst, it does not disappear by itself, but not every endometrioma needs an operation.
- Medicines: dienogest eases endometriosis pain and may slow the growth of the cyst; it does not dissolve it.
- Laparoscopic cystectomy: considered when the cyst is large, growing or painful despite medicines, or when the scan picture is not clear. I peel the cyst wall away and keep as much healthy ovary as possible.
- Protecting your egg reserve: surgery on an endometrioma can lower AMH, so I often check AMH first. A small endometrioma in a woman planning IVF is sometimes better left alone.
- After surgery: endometriomas come back more often than other cysts; hormonal treatment afterwards lowers that chance.
Because endometriosis can affect fertility, I time any operation around when you hope to conceive.
Ovarian Torsion and Burst Cysts: Emergencies
Torsion - the ovary twisting on its blood supply - can happen at any age, including in young girls and during pregnancy. Dermoid cysts and ovaries enlarged by fertility treatment carry extra risk, and torsion is seen most often with a cyst of 5 cm or larger. It causes sudden, severe pain on one side, often with nausea and vomiting, and needs an emergency laparoscopy to untwist the ovary. An ovary that looks dark during the operation often recovers once it is untwisted, so I preserve it whenever possible, especially in young women.
Rupture or bleeding from a cyst causes sudden pain that can spread across the abdomen. Most cases settle with pain relief and observation; heavy bleeding inside the abdomen needs urgent surgery, usually by laparoscopy.
Sudden pelvic pain should always be seen the same day.
Ovarian Cyst Removal by Laparoscopy: Cystectomy and Recovery
- The operation is usually done through three or four small openings.
- I peel the wall of the cyst away from the ovary and leave the healthy tissue behind.
- A dermoid cyst is removed whole where possible, inside a retrieval bag.
- Removing the whole ovary (oophorectomy) is kept for when the ovary cannot be saved, or when removal is the safer choice - for example with some cysts after menopause.
- Most women go home in one or two days and are back at desk work in one to two weeks.
- Every cyst is sent for histology, and I go through the report with you at follow-up.
- Risks: bleeding, infection, injury to nearby organs, and a reduction in ovarian reserve.
- Recurrence: uncommon with dermoid cysts and more frequent with endometriomas; hormonal treatment after surgery lowers the chance of an endometrioma coming back.
Ovarian Cyst in Pregnancy, and Effects on Fertility
- Functional cysts do not affect fertility in the long run.
- Endometriomas come with endometriosis, which can affect fertility; how I protect your egg reserve when one is treated is explained under chocolate cyst treatment above.
- Cysts are often seen on early pregnancy scans. Most are corpus luteum cysts that go away by about 14–16 weeks.
- A cyst that persists or is large is monitored. If surgery is needed in pregnancy, it is usually done by laparoscopy in the second trimester, when the risk to the pregnancy is lowest. Torsion is the exception, because it makes surgery urgent.
My Approach to Ovarian Cysts, Step by Step
- I look at your scan, repeat or refine it if needed, and explain in Gujarati, Hindi or English what kind of cyst it is likely to be.
- For many women, the plan turns out to be no treatment at all, or a single repeat scan.
- I perform laparoscopic cystectomy at Divine Women's Hospital, Gota, which is NABH-certified.
- Hospital staff run its emergency service 24×7, so torsion and similar emergencies can be operated on by laparoscopy whatever the hour.
- A cyst that raises concern is managed together with a gynaecological oncology team.
Ovarian Cyst Surgery Cost: What the Estimate Covers
What you pay for ovarian cyst surgery is set by the type of operation, the days in hospital and the tests around it. Many women never need surgery at all. Often a consultation and a repeat scan are enough. In that case the main cost is the ultrasound and any blood tests, such as CA-125, or AFP, LDH and hCG for a complex cyst in a young woman. If surgery is advised, the estimate for a laparoscopic cystectomy covers the operation, anaesthesia and theatre. It also covers a hospital stay of usually one or two days, medicines, and the histology report on the cyst. An emergency operation for torsion or bleeding is charged on the same principles. The hospital gives its current charges on request once surgery has been agreed.
Ovarian Cyst Care in Five Steps
- Ultrasound reviewthe cyst is described by its size, wall, contents and blood flow.
- Blood tests if neededmarkers chosen according to your age and the scan.
- A clear planno follow-up, a repeat scan, medicines or surgery, with the reasons explained.
- Surgery if neededlaparoscopic cystectomy, aiming to keep the ovary, usually with a one- or two-day stay.
- Follow-upthe histology report reviewed, and a plan for future scans or fertility.
When an Ovarian Cyst Should Be Reviewed
- A scan has shown a cyst and nobody has explained it to you.
- You have persistent bloating, pelvic pressure or a feeling of fullness.
- You have painful periods or painful intercourse and a known cyst.
- A cyst has not gone away on a repeat scan.
- A cyst has been found in early pregnancy.
- Any ovarian cyst has been found after menopause.
Ovarian Cyst Symptoms Needing Same-Day Care
- Abrupt, intense one-sided pain in the lower abdomen, especially with vomiting - possible torsion.
- Severe abdominal pain with fainting, dizziness or a racing pulse - possible bleeding inside the abdomen.
- Abdominal pain with a positive pregnancy test - an ectopic pregnancy must be ruled out.
- Pelvic pain with fever
- Abdominal swelling that is increasing quickly, with breathlessness.
These need the hospital's emergency team, not an OPD appointment: phone Divine Women's Hospital - it is staffed 24×7 - and come straight there.
Ovarian Cyst Myths, Answered
Belief: Every cyst has to be taken out.
Most cysts in women who have periods are functional and go away. Surgery is for cysts that persist, are large or complex, or cause symptoms.
Belief: Having a cyst means I have PCOS.
A single cyst is not PCOS; PCOS needs other features as well.
Belief: A raised CA-125 means cancer.
In younger women it is often raised by endometriosis, fibroids, infection or simply a period.
Belief: Cyst surgery always means losing the ovary.
A cystectomy keeps the healthy ovarian tissue; removing the ovary is reserved for particular situations.
Questions Patients Ask Me About Ovarian Cysts
Will my ovarian cyst disappear without treatment?
Functional cysts usually clear within one to three cycles, and a repeat scan after 6–12 weeks confirms it. Dermoid cysts, endometriomas and cystadenomas do not go away on their own.
How big does an ovarian cyst have to be before it needs an operation?
Size is only one factor. A simple cyst under 5 cm usually needs nothing. Cysts over about 7 cm, cysts that persist or grow, complex cysts and painful cysts are usually considered for removal.
Could an ovarian cyst affect my chances of pregnancy?
Most functional cysts do not. Endometriomas can, through endometriosis, and any surgery should keep as much healthy ovary as possible. We talk about your fertility plans before any operation.
What does ovarian torsion mean?
The ovary twists on its own blood supply, causing sudden pain on one side with nausea and vomiting. It needs emergency keyhole surgery to untwist the ovary and try to save it.
Can an ovarian cyst be dissolved with medicines?
No medicine dissolves a cyst that is already there. The pill can prevent new functional cysts, but an established dermoid or cystadenoma needs surgery if it requires treatment.
Does an ovarian cyst mean cancer?
Most cysts, especially in younger women, are benign. The risk of cancer is higher after menopause, and when a cyst has solid areas, thick internal walls or abnormal blood flow.
What is meant by a chocolate cyst?
That is the everyday name for an endometrioma: a cyst formed by endometriosis and filled with thick, old blood. It often causes painful periods and can affect fertility.
Is a cyst on the ovary harmful during pregnancy?
Usually not. Corpus luteum cysts seen in early pregnancy go away by the second trimester. Larger or persistent cysts are monitored and only rarely need surgery.
How much rest will I need after laparoscopic removal of a cyst?
Most women go home in one or two days, walk the same evening and return to desk work in one to two weeks. Avoid heavy lifting and strenuous exercise for about four weeks.