Ovarian Cyst Symptom Checker

An ovarian cyst is a fluid-filled sac that forms on or in an ovary. Most are what clinicians call functional cysts — they form as a normal part of the menstrual cycle, when the sac that releases an egg either doesn't open or seals back up and fills with fluid. These are very common in people who are still having periods, and the great majority are harmless. Many cause no symptoms at all and are found only by chance during a scan done for something else. Others can grow large enough to cause pressure, bloating, or pain. A cyst is not the same thing as PCOS (polycystic ovary syndrome), which despite its name is a hormone condition rather than a problem with a single cyst, and it's not the same as endometriosis.

Most functional cysts cause no symptoms. When a cyst does cause them, the most typical is pressure, fullness, or a dull ache low in the abdomen — usually on the one side where the cyst is. Others include bloating or a swollen feeling in the lower belly, feeling full soon after you start eating or needing to pass urine more often (a larger cyst pressing on nearby organs), deep pain during or after sex, and sometimes changes in your periods. None of these is unique to an ovarian cyst — bloating and pelvic pain in particular have many causes — which is exactly why this tool reads a pattern rather than making a diagnosis, and why a scan is what actually settles it.

Most are not dangerous, and most go away on their own. Functional cysts — by far the most common kind — often clear up without any treatment within a few months, which is why a clinician who finds one will frequently just recheck it with a repeat ultrasound rather than treat it right away. What a clinician watches more closely is a cyst that is persistent, growing, unusually large, complex-looking on a scan, or found after menopause; those can need further evaluation and occasionally surgery. So finding a cyst is usually not alarming, but a cyst that sticks around or causes symptoms is worth a proper look. Only a scan and a clinician can tell the difference.

Sudden, severe pain on one side of the pelvis — especially with nausea or vomiting, a fever, or feeling faint, lightheaded, or dizzy — is a medical emergency and is not what this checker is for. Sudden, severe pain like that can mean a cyst has ruptured (burst) or, more seriously, that the ovary has twisted on itself and cut off its own blood supply — a condition called ovarian torsion. Torsion is a surgical emergency: an ovary can be lost if it isn't treated quickly. A fever together with pelvic pain more often signals a pelvic infection rather than a cyst rupturing or twisting, and it too needs urgent care. If you have symptoms like these, go to an emergency room now or call your local emergency number. Do not wait it out, and do not wait for this or any online tool. This checker is only for ongoing, gradual symptoms.

The main way is a pelvic ultrasound, usually arranged by a gynecologist. A clinician starts with your symptom history and a pelvic exam, then uses ultrasound to see whether a cyst is present, how big it is, and whether it looks simple (a plain fluid-filled sac, usually functional and harmless) or more complex. Because most functional cysts resolve by themselves, the next step is often watchful waiting — a repeat scan a few weeks or months later to confirm it has shrunk or gone. Blood tests are sometimes added depending on your age and what the scan shows. A cyst can't be diagnosed from symptoms alone, which is why this tool can only tell you whether the pattern is worth raising — never whether you have one.

Yes. This checker runs entirely in your browser. Your answers are read on your own device and are never sent to a server, saved, or shared — close the tab and they're gone. It's general educational information based on ACOG, the U.S. Office on Women's Health, and MedlinePlus patient guidance; it can't diagnose you, isn't a scan, and doesn't replace an evaluation by a licensed clinician.