Ovarian Cyst Symptoms: The Complete List, and the Red Flags That Need Urgent Care

Most ovarian cysts cause no symptoms. When they do, the most common are a dull ache low on one side of the pelvis, abdominal bloating, and a delayed or heavier period. Symptom severity reflects where a cyst sits and what it is pressing on, not how dangerous it is.

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What are the symptoms of an ovarian cyst?

Most ovarian cysts produce no symptoms and are found by chance. Where symptoms do occur, they fall into four groups: one-sided pelvic pain, abdominal bloating or distension (visible swelling of the abdomen), changes to the menstrual cycle, and pressure on the bladder or bowel.

The table below lists the symptoms an ovarian cyst can realistically cause, how each one actually feels, and how commonly it occurs. The frequency column is the part that matters. A list that presents every symptom as equally likely is not usable for someone trying to work out what is happening to them.

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Symptom	What it actually feels like	How common	What it usually means
One-sided pelvic pain	Dull ache, heaviness or pulling low in the abdomen on one side, worse on movement	Common	The cyst is stretching the ovary capsule or pressing on nearby tissue
Bloating or abdominal distension	Waistband tightness and visible swelling that varies through the day	Common	The cyst occupies space in the pelvis and displaces the bowel
Delayed or irregular periods	A late period with a negative pregnancy test	Common	The follicle did not release an egg, so the hormonal trigger for a period is delayed
Heavier periods	More bleeding or more cramping than your usual pattern	Fairly common	Hormonal disruption of the cycle, rather than the cyst itself bleeding
Mid-cycle pain	A short-lived ache around day 12 to 16 of the cycle	Fairly common	Ovulation, sometimes with a functional cyst forming or settling
Deep pain during intercourse	Deep, one-sided discomfort in certain positions, not at the entrance	Less common	The cyst sits behind or beside the uterus and is compressed
Urinary frequency or incomplete emptying	Passing urine more often, or feeling the bladder has not emptied	Less common	A larger cyst is pressing on the bladder
Constipation or bowel pressure	Difficulty passing stool and a sense of fullness low in the abdomen	Less common	A larger cyst is pressing on the bowel
Feeling full quickly	Being unable to finish a normal-sized meal	Less common	A larger cyst reduces the room the stomach has to expand
Lower back ache	A dull ache across the lower back, alongside pelvic pain rather than instead of it	Uncommon	Referred pain from the pelvis, not a spinal problem

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Two things follow from this list. You cannot tell from symptoms alone whether you have a cyst or what type it is, because that needs a pelvic ultrasound scan. And where a functional cyst is responsible, symptoms usually settle as the cyst resolves over two to three menstrual cycles, which is why a repeat scan rather than treatment is the usual next step.

Can you have an ovarian cyst with no symptoms at all?

Yes, and this is the norm rather than the exception. Most ovarian cysts never announce themselves. They form, sit quietly for a few weeks and resolve without the person ever knowing they were there.

Because of this, the great majority of cysts are found incidentally, meaning they turn up on a scan booked for an entirely different reason. The four most common discovery routes are a routine health check or master health package scan, an early pregnancy scan, a fertility assessment, and imaging ordered to investigate unrelated abdominal pain.

If you have just been told you have a cyst and had no symptoms at all, it is worth being clear about what that means. A silent cyst is not a warning sign you failed to notice. Absence of symptoms is reassuring rather than concerning, because what makes a cyst worth investigating further is how it looks on the scan, not how loudly it announces itself.

There are also no reliable early signs to watch for. Anyone offering a list of early warning signs of an ovarian cyst is describing the symptoms of an established cyst, not an early one.

What does ovarian cyst pain actually feel like?

Ovarian cyst pain is usually one-sided, low in the abdomen on the same side as the cyst, and felt as a dull ache, heaviness or pulling rather than a sharp stab. It is typically intermittent rather than constant. Sharp, sudden, severe pain is a different pattern altogether and points to rupture or torsion, both covered in the red flag section below.

Where exactly is the pain felt?

Most descriptions of cyst pain stop at the word pelvic, which is not much use. Here are landmarks you can actually apply.

The pain sits low in the abdomen, below the level of the navel, roughly midway between the hip bone and the midline, on one side. It feels deeper than a muscle ache, as though it comes from inside rather than from the abdominal wall. It is not felt at the vaginal opening, and it does not sit centrally over the pubic bone, which is more typical of bladder or uterine pain. Pressing on the area may reproduce a dull discomfort, but rarely a sharp, pinpoint tenderness.

Which side does an ovarian cyst hurt on?

On the same side as the affected ovary, and it does not alternate. A cyst on the right ovary causes right-sided pain for as long as it is there. Pain that swaps sides from month to month is far more likely to be ovulation pain from alternating ovaries than a single cyst.

The honest limit is that you cannot reliably tell left from right by feel alone. Referred pain misleads, and right-sided pelvic pain overlaps with the appendix and the urinary tract. The side of pain is a useful detail to report, not a diagnosis. If you are working out whether one-sided pain is ovulation or a cyst, our guide to sharp pelvic pain on one side goes through that distinction in detail.

Can an ovarian cyst cause back pain, hip pain or leg pain?

Back pain on its own is rarely caused by an ovarian cyst. This is the most overattributed symptom on the whole list, and getting it wrong sends people down the wrong investigative path.

The qualification matters. Referred lower back ache can occur alongside pelvic pain, because the pelvis and lower back share nerve supply, and a large cyst can occasionally press on pelvic nerves and cause discomfort spreading into the hip or upper thigh. But that is back pain with pelvic pain, not instead of it.

Isolated back, hip or leg pain, with no pelvic symptoms, no cycle pattern and no abdominal component, almost always has another explanation, most often musculoskeletal. It should be assessed as back pain, not as a cyst. If you have been told you have a small cyst and you also have back pain, the two are probably unrelated.

Does ovarian cyst pain come and go?

Yes, typically. Most people describe good days and bad days rather than continuous pain. It is usually worse on movement, during intercourse, around ovulation, and in the days before a period. There is no consistent pattern of it being worse at night; what changes is that there is less to distract you from it.

The pattern that matters for triage is the opposite one. Pain that is constant and escalating hour by hour, rather than coming and going, needs assessment, and that is covered next. Intermittent cyst pain is usually manageable with ordinary pain relief and rarely a reason to take time off work.

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Ovarian cyst bloating: what it is and what it is not

Bloating and abdominal distension are among the commonest symptoms of an ovarian cyst, and among the most misread. The mechanism is straightforward once explained. The pelvis is a fixed space, and a cyst occupies part of it. Larger cysts displace the bowel upwards and outwards rather than inflating the abdomen with gas.

That distinction explains what people actually notice. The abdomen looks fuller, the waistband feels tighter, and clothes fit differently, but there is none of the gassiness, rumbling or relief after passing wind that goes with digestive bloating. Distension from a cyst also tends to be steady rather than arriving after meals. In practice, it is usually only cysts above roughly 5 cm that produce noticeable distension, and small cysts do not cause it at all.

Does an ovarian cyst cause weight gain?

No. An ovarian cyst does not cause weight gain.

The confusion is understandable, because the abdomen genuinely does look bigger, but distension is not weight. What you are seeing is displacement: existing organs pushed into a different shape by something occupying space beside them. Even a large cyst, one big enough to change the outline of the abdomen, typically weighs a small fraction of what the scales would need to register as a real weight change.

There is a practical test that separates the two. Distension varies. It changes through the day, across the menstrual cycle and from one week to the next. Genuine weight gain does not fluctuate like that. If the scales have moved steadily upwards over months while your abdomen looks the shape it always did, a cyst is not the explanation.

How does an ovarian cyst change your periods?

Yes, a cyst can delay a period, and this is one of the commoner reasons for an unexplained late period in someone who is not pregnant.

The mechanism is worth understanding, because it explains most of what happens to the cycle. In a normal month, a follicle (the small fluid-filled sac in the ovary that holds a developing egg) grows, releases its egg, and the emptied follicle then produces the progesterone that eventually triggers a period. When the follicle does not release its egg, it can keep filling with fluid and become a functional cyst. If ovulation has not happened, the hormonal sequence stalls, and the period is late. You can read more about how follicles normally develop in our guide to the ovarian follicle and its role in fertility.

This is also why a delayed period alongside a negative pregnancy test is such a common presentation. The test is negative because there is no pregnancy. The period is late because there was no ovulation that month. Both facts are consistent with each other.

Cysts can also make periods heavier or more painful than your usual pattern, and can cause spotting between periods. If your periods have become consistently more painful over time, that change is worth assessing in its own right.

The honest limit: cysts do not stop periods altogether over the long term. Periods that are persistently absent for several months point to a different cause, such as a hormonal or thyroid condition, and deserve their own assessment rather than being attributed to a cyst.

Pressure symptoms: bladder, bowel and pain during sex

Three symptoms share a single cause: a cyst large enough to press on a neighbouring structure. The pelvis is crowded, and the bladder, the bowel and the upper vagina all sit within a few centimetres of the ovaries.

Bladder pressure. A cyst pressing on the bladder reduces how much it can comfortably hold, so you pass urine more often, sometimes with a sense that the bladder has not fully emptied. There is no burning or stinging, which is what separates this from a urinary infection.

Bowel pressure. A cyst pressing on the bowel can cause constipation, a feeling of fullness low in the abdomen, and a sense of incomplete emptying after opening the bowels.

Pain during sex. Deep dyspareunia (pain felt deep inside during intercourse, rather than at the vaginal entrance) occurs when a cyst sits behind or beside the uterus and is compressed during deep penetration. It is characteristically one-sided and position-dependent, which is a useful distinguishing feature. Pain at the entrance is a different problem with different causes.

Feeling full quickly after small meals belongs in the same group, caused by a larger cyst reducing the room the stomach has to expand. This one carries a note of caution. Early satiety that is persistent rather than occasional also forms part of a symptom pattern covered in the red flag section below, and is worth reading there.

Do symptoms differ by the type of ovarian cyst?

Yes, and the differences are useful, though none of them is reliable enough to identify a cyst type without a scan. The pattern that comes closest is that cysts which bleed or provoke inflammation hurt most, while cysts that simply grow stay silent until they are large. To answer the question directly: endometriomas and haemorrhagic cysts are the two types that most often cause significant pain, endometriomas because of the inflammation associated with them, and haemorrhagic cysts because bleeding inside the cyst stretches it quickly. Dermoid cysts and cystadenomas are typically the quietest until size becomes the issue.

How the Different Types of Ovarian Cysts Compare

Not all ovarian cysts behave the same way. Some are a normal part of the menstrual cycle and disappear on their own, while others persist, grow slowly or return after treatment. The type of cyst often shapes the symptoms a woman notices, how quickly they appear and whether any treatment is needed. The table below compares the most common cyst types by their usual symptom pattern and the feature that tends to set each one apart, with a link to a detailed guide on each.

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Cyst type	Typical symptom pattern	Distinguishing feature	Read more
Follicular cyst	Often silent; mild mid-cycle ache; occasionally a delayed period	Appears and resolves with the cycle, usually within two to three cycles	Follicular cyst guide
Corpus luteum cyst	Delayed period, one-sided ache, sometimes spotting	Forms after ovulation, so it belongs to the second half of the cycle	Corpus luteum cyst guide
Haemorrhagic cyst	Sudden one-sided pain that builds over hours, then settles	Abrupt onset, because bleeding stretches the cyst quickly	Haemorrhagic ovarian cyst guide
Endometrioma (chocolate cyst)	Persistent one-sided pelvic pain with markedly painful periods	Pain is present outside as well as during periods, and tends to recur	Chocolate cyst guide
Dermoid cyst	Usually no symptoms until large, then pressure and distension	Silent for years; higher torsion risk once large	Dermoid cyst guide
Cystadenoma	Abdominal fullness, distension and pressure symptoms	Can grow considerably larger than functional cysts before causing pain	Cystadenoma guide

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These patterns are a general guide rather than a way to self-diagnose. Symptoms often overlap between cyst types, and many cysts cause no symptoms at all and are found only during a routine scan. A pelvic ultrasound, sometimes supported by blood tests, is usually needed to confirm the type of cyst and decide whether to monitor it or treat it. Sudden severe pelvic pain, pain with fever or vomiting, or feeling faint needs urgent medical attention, as these can signal a ruptured cyst or ovarian torsion.

The Cystadenoma row is cut off in your screenshot. If the text is incomplete in the document, it could read: "Can grow considerably larger than functional cysts before causing pain."

One line each is deliberate. Symptom pattern narrows the possibilities. It does not settle them. An ultrasound scan characterises a cyst by what it contains and how its wall looks, and that is what determines the type.

Does a bigger ovarian cyst cause worse symptoms?

No, not reliably. A large simple cyst can be completely silent while a small one causes significant pain.

What symptom severity actually tracks is position, tension and pressure: whether the cyst is stretching the ovary capsule, whether it has bled into itself, and whether it is pressing on the bladder, bowel or a nerve. A 3 cm haemorrhagic cyst that has stretched rapidly can be far more painful than an 8 cm simple cyst sitting quietly in the pelvis. Diameter is only one input, and not the most important one.

The table below gives what each size band typically does and does not cause. Read it as a guide to what is plausible, not as a way of estimating your own cyst.

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Size band	Usually causes	Usually does not cause
Under 5 cm	Often nothing at all; occasionally a mild one-sided ache	Visible distension, bladder or bowel pressure, early satiety
5 to 7 cm	A one-sided ache, some awareness of fullness or heaviness	Marked distension in most people; significant bowel symptoms
Over 7 cm	Pressure symptoms, visible distension, early satiety, a more noticeable ache	Reliable pain: large cysts can still be entirely silent

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Two things follow. You cannot estimate the size of a cyst from how you feel, and you cannot check for one at home. Ovarian cysts sit deep in the pelvis, behind the abdominal wall and bowel, and are not palpable by the person who has them. Self-examination is not a way to detect or monitor one. Size, type, and change over time all come from ultrasound. For what ovary measurements mean, see our guide to normal ovary size.

Ovarian cyst red flags: when to go to hospital today

If your pain is severe, read this section first. Most ovarian cyst symptoms can wait for a routine appointment. A small number cannot. The table below sets out the nine presentations that change the timeline, and how fast each one needs to be seen. Where it says immediately, that means go to a hospital emergency department now, not book an appointment.

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Red flag	What it may mean	What to do	How fast
Sudden severe one-sided pelvic pain	Ovarian torsion or a ruptured cyst	Go to a hospital emergency department	Immediately
Severe pain with vomiting	Ovarian torsion until proven otherwise	Go to a hospital emergency department	Immediately, within hours
Fainting, dizziness or a racing pulse	Bleeding into the abdomen	Go to a hospital emergency department	Immediately
Breathlessness or pain at the tip of the shoulder	Blood irritating the diaphragm after a rupture	Go to a hospital emergency department	Immediately
Pain escalating steadily over hours	Torsion, or continuing bleeding	Go to a hospital emergency department	Immediately
A positive pregnancy test with one-sided pain	Ectopic pregnancy must be excluded	Contact a gynaecologist or emergency department	Same day, whatever the severity
Fever or chills with pelvic pain	Pelvic infection or an infected cyst	Contact a doctor for urgent assessment	Same day
Rapidly enlarging abdomen with loss of appetite	Fluid accumulation or a rapidly growing mass	Contact a gynaecologist	Within 24 to 48 hours
Any new ovarian cyst found after menopause	Needs characterising, as a functional explanation is unavailable	Arrange a gynaecology review	This week

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Fever or chills alongside pelvic pain is the one red flag that points away from the cyst itself and towards infection. Our guide to the early signs of pelvic infection sets out that picture, which needs same-day antibiotics rather than gynaecological surgery.

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Sudden severe one-sided pain with vomiting

This combination is the classic presentation of ovarian torsion, where the ovary twists on its supporting ligaments and its blood supply is cut off. The pain is severe, one-sided and sudden, and vomiting usually follows the pain rather than preceding it.

Torsion is the one complication that cannot wait until morning. It is treated surgically, and the ovary can usually be saved if the twist is corrected within hours. If this is your pattern, go to an emergency department now. Full details are on our ovarian torsion page.

Sudden sharp pain that then starts to ease

This is the usual pattern of a ruptured ovarian cyst. The pain arrives abruptly, is at its worst in the first few minutes, then settles over hours as the released fluid is absorbed. Most ruptures are self-limiting and need only rest and simple pain relief.

The caveat is the opposite pattern. Pain that keeps worsening rather than settling, particularly with dizziness, breathlessness or a racing pulse, suggests continuing bleeding into the abdomen and needs hospital assessment straight away. Full details are on our ruptured ovarian cyst page.

A positive pregnancy test with one-sided pain

Get assessed the same day, without exception.

This is the one red flag where the correct advice does not change with how mild the pain feels. An ectopic pregnancy, where a pregnancy implants outside the uterus, presents almost identically to a cyst in early pregnancy: one-sided pain, a positive test, sometimes light bleeding. The two cannot be told apart without a scan, and the consequences of missing an ectopic pregnancy are serious. Mild pain does not make it safe to wait and see.

Persistent bloating that does not settle

This symptom set worries people most, so it is worth being precise.

The pattern that warrants assessment, set out in NICE guideline NG12, is bloating that is persistent or frequent rather than fluctuating, occurring particularly more than 12 times a month, alongside any of feeling full quickly, loss of appetite, pelvic or abdominal pain, or increased urinary urgency and frequency. The concern rises with age and is greatest from 50 onwards.

The honest reassurance is that this specific pattern is uncommon, and the overwhelming majority of persistent bloating is not ovarian cancer. Bloating that comes and goes with meals or your cycle does not fit this pattern.

A cyst found after menopause

A cyst found after menopause is not an emergency, but not something to defer either.

Before menopause, most cysts are functional, meaning they are a by-product of ovulation and resolve on their own. After menopause, the ovaries are no longer ovulating, so that explanation is unavailable and any cyst needs characterising on its own merits. That lowers the threshold for prompt assessment.

This is appropriate caution rather than a signal that something is wrong. Most cysts found after menopause are still benign. Visit a gynaecologist rather than waiting for symptoms.

Symptoms an ovarian cyst does not cause

Several symptoms commonly attributed to ovarian cysts are not caused by them. This matters more than it might seem. Attributing a symptom to a cyst that cannot cause it means the real cause goes uninvestigated.

Weight gain. Not caused by an ovarian cyst. Distension is displacement, not fat. Persistent weight gain alongside irregular periods more often points to polycystic ovary syndrome or a thyroid condition.

Fatigue and tiredness on their own. Not a symptom of an ovarian cyst. Where tiredness occurs alongside one, the likelier causes are anaemia from heavy periods, thyroid dysfunction or poor sleep. Each deserves investigating on its own terms.

Hair loss, acne and excess facial hair. Not caused by ovarian cysts. This cluster is driven by androgens (male-type hormones) and belongs to polycystic ovary syndrome, which, despite its name, is a hormonal condition rather than a collection of cysts.

Nausea without pain. Not a cyst symptom. The distinction is important: nausea with severe one-sided pain is a torsion red flag, but nausea on its own, with no pain, is not.

Breast tenderness. Not caused by ovarian cysts. This is a normal cyclical hormonal effect.

Headaches. Not caused by ovarian cysts. There is no plausible mechanism linking the two.

Vaginal discharge. Not a cyst symptom. Discharge with fever and pelvic pain suggests infection, which is a different problem and a red flag in its own right.

Infertility, in the great majority of cases. Most ovarian cysts do not affect fertility at all, and functional cysts have no bearing on it. The exception is endometriomas, which are associated with endometriosis and can affect ovarian function. That is a conversation to have with a fertility specialist rather than a reason to assume a cyst is the problem.

The acne, hair and weight cluster in particular belongs to a different condition. Our PCOS guide covers it properly.

Ovarian cyst symptoms compared with PCOS, fibroids, endometriosis, UTI and appendicitis

Pelvic pain is not specific. The same ache can come from the ovary, the uterus, the bladder or the bowel, and the commonest practical question people arrive with is how to tell cyst pain from ordinary period pain. The most useful distinguishing test is timing and sidedness. Period pain is central, cramping and tied tightly to the days of bleeding. Cyst pain is one-sided, more constant in character, and present outside the bleeding days.

The table below sets out the conditions most often confused with an ovarian cyst.

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Condition	How the pain or symptom differs	The giveaway feature	What confirms it
Ovarian cyst	One-sided, dull, heavy and intermittent, present between periods	Consistently the same side, with no burning on passing urine and no migration of the pain	Pelvic ultrasound scan
PCOS	Not primarily painful; the picture is one of cycle and hormone disruption	Irregular or absent periods with acne or excess hair growth, rather than pain	Blood tests and scan appearance assessed together
Uterine fibroid	Central and pressing rather than one-sided	Heavy periods with a sense of downward pressure; arises from the uterus, not the ovary	Pelvic ultrasound scan
Endometriosis	Pain that builds before and during periods and recurs every month	Pain outside as well as during periods, often with pain on opening the bowels	Specialist assessment, sometimes laparoscopy
Urinary tract infection	Central and low, over the pubic bone, not one-sided	Burning or stinging on passing urine, with urgency; fever if it reaches the kidney	Urine dipstick and culture
Appendicitis	Starts centrally around the navel, then migrates to the lower right	Migration of the pain, with fever, loss of appetite and worsening over hours	Urgent surgical assessment

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Two conditions sit just outside the table but come up constantly. Irritable bowel syndrome overlaps almost entirely on bloating, and is distinguished by its relationship to eating and to opening the bowels, which cyst bloating does not have. Adenomyosis, where tissue similar to the uterine lining grows into the muscle of the uterus, causes heavy and painful periods with a central rather than one-sided ache. Our adenomyosis guide covers that pattern.

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How to describe your symptoms to your doctor

What you tell your gynaecologist shapes what gets investigated. Six details are worth noting down before the appointment, because they are the ones most often forgotten in the room and the most useful when you remember them.

Which side. Left, right or both, and whether it has ever swapped sides.

Constant or intermittent. Whether the pain is there all the time or comes in episodes, and roughly how long an episode lasts.

Where it sits in your cycle. Note the date your last period started and when the pain occurs relative to it. Mid-cycle, premenstrual, and during bleeding are three different answers.

What makes it worse. Movement, exercise, intercourse, opening the bowels, a full bladder.

How long it has been happening. Weeks, months or years. This is the single detail that most often changes the management plan.

What has changed recently. Any change in pattern, severity or associated symptoms matters more than the absolute level of pain.

One practical instruction beyond the list: bring your previous scan reports and, if you have them, the images. The comparison between two scans taken a few months apart is frequently more informative than any single measurement. A cyst that has stayed the same size is a very different clinical picture from one that has grown, even when today's measurement is identical. If a previous scan was done elsewhere, ask for a copy rather than assuming it will be available.

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