Are ovarian cysts a sign of cancer?

Rarely. Most cysts in women of reproductive age are functional and benign. The risk of a cyst being cancerous is higher after menopause and when the cyst is large, complex, or growing, which is why these are monitored more closely or removed. Ultrasound features and blood tests help your doctor judge the risk.

Will an ovarian cyst affect my fertility?

Functional cysts do not affect fertility and often reflect normal ovarian activity. Endometriomas and the hormonal imbalance of PCOS can make conception harder, and surgery to remove cysts can occasionally reduce the ovary's egg reserve. If you are trying to conceive, discuss any cyst and its treatment with a specialist.

How do I know if a cyst has burst?

A ruptured cyst typically causes a sudden sharp pain on one side of the lower abdomen, sometimes after exercise or sex, which may be followed by a duller ache. Many ruptures are minor and settle with rest and pain relief, but severe pain, faintness, heavy bleeding, or vomiting suggests significant internal bleeding or torsion and needs emergency care.

Should I have the cyst removed?

Most simple cysts under about five centimeters are left alone and rechecked, because they usually disappear within a few cycles. Removal is considered when a cyst is large, persists beyond a few months, has worrying features, causes ongoing pain, or occurs after menopause. Surgery is usually done laparoscopically, keeping the ovary whenever possible.

ReproductiveICD-10: N83.2Very common; most women develop at least one functional cyst during their reproductive years

Ovarian Cysts

Also known as: Ovarian cyst, Functional ovarian cyst, Adnexal cyst

Ovarian cysts are fluid-filled sacs that develop on or inside an ovary. The vast majority are functional cysts, which form as a normal part of the menstrual cycle when a follicle fails to release its egg or seals over after releasing it. These are harmless, cause no symptoms, and usually disappear on their own within a few menstrual cycles. Other types, such as dermoid cysts, cystadenomas, and endometriomas, are less common and may need treatment if they grow large or cause symptoms. Ovarian cysts are rarely cancerous, particularly before menopause. The main immediate risks are a cyst rupturing or causing the ovary to twist, both of which cause sudden severe pain and need urgent assessment.

At a Glance

Common symptoms: Often no symptoms, with the cyst found incidentally on an ultrasound, Dull or sharp pain or pressure in the lower abdomen on one side, Bloating or a feeling of fullness
Main treatments: Watchful waiting with repeat ultrasound for simple cysts, which usually resolve on their own, Over-the-counter pain relief for discomfort, Hormonal contraception to prevent new functional cysts from forming, although it does not shrink existing ones
Category: Reproductive · Very common; most women develop at least one functional cyst during their reproductive years
See a doctor if: Sudden severe pelvic or abdominal pain, especially with vomiting or fever (emergency, possible rupture or torsion)

Symptoms

Often no symptoms, with the cyst found incidentally on an ultrasound

Dull or sharp pain or pressure in the lower abdomen on one side

Bloating or a feeling of fullness

Pain during sex or bowel movements

Irregular periods or spotting

Needing to urinate frequently if the cyst presses on the bladder

Sudden severe pain with nausea or vomiting if a cyst ruptures or the ovary twists

Causes

Follicular cysts, when the follicle does not release its egg and keeps growing
Corpus luteum cysts, when the follicle seals after ovulation and fills with fluid
Endometriomas, cysts filled with old blood caused by endometriosis
Dermoid cysts, which arise from cells present from birth and can contain hair, skin, or teeth
Cystadenomas, which develop from the surface of the ovary and can grow large
Polycystic ovary syndrome, in which many small follicles accumulate on the ovaries

Risk Factors

Being of reproductive age, when functional cysts are most common
Fertility treatments that stimulate ovulation
Endometriosis
Pregnancy, when the corpus luteum cyst may persist
A previous ovarian cyst
Hypothyroidism and certain hormonal conditions

Diagnosis

Pelvic examination
Transvaginal or abdominal ultrasound to confirm the cyst, its size, and whether it is simple (fluid-filled) or complex
Pregnancy test to rule out ectopic pregnancy
Blood tests such as CA-125 in selected cases, particularly in postmenopausal women or with complex cysts
Repeat ultrasound after six to twelve weeks to see whether the cyst has resolved, or MRI for complex cysts

Treatment

Watchful waiting with repeat ultrasound for simple cysts, which usually resolve on their own
Over-the-counter pain relief for discomfort
Hormonal contraception to prevent new functional cysts from forming, although it does not shrink existing ones
Laparoscopic surgery to remove cysts that are large, persistent, complex, or causing symptoms, usually preserving the ovary
Emergency surgery for ovarian torsion or a ruptured cyst with significant bleeding
Supportive: heat on the lower abdomen and rest during painful episodes
Supportive: for women with PCOS, weight management and regular exercise help regulate cycles

Prevention

Functional cysts cannot be fully prevented, but hormonal contraception reduces their formation
Attend regular gynecological checkups
Report changes in your menstrual cycle or new pelvic pain
Manage endometriosis and PCOS, which are linked to specific cyst types
Be aware of warning symptoms so complications are treated quickly

When to See a Doctor

Sudden severe pelvic or abdominal pain, especially with vomiting or fever (emergency, possible rupture or torsion)
Pain with dizziness, faintness, or rapid breathing, which may indicate internal bleeding (emergency)
Persistent pelvic pain, bloating, or a feeling of fullness that does not go away
Irregular periods together with pelvic pain
Any pelvic mass or symptoms after menopause, when cysts need more careful evaluation

Frequently Asked Questions

Related Conditions

Polycystic Ovary Syndrome

Endocrine

Endometriosis

Reproductive

Ovarian Cancer

Cancer

Dysmenorrhea

Reproductive

Infertility

Reproductive

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