Most ovarian cysts are quiet and harmless
Ovarian cysts are fluid-filled sacs that form on or in an ovary. Most are functional cysts that develop as part of the normal cycle: a follicle grows, releases an egg, and either resolves or temporarily becomes a small cyst. These almost always go away on their own within a cycle or two.
Cysts get attention when they cause pain, grow large, rupture, or do not resolve. Even then, most are not cancer and most do not require surgery.
Common types of cysts
Knowing the type of cyst usually clarifies what to do next. Imaging (ultrasound) is the main way clinicians sort them out.
Common categories:
- Follicular cyst: a follicle that did not release its egg; usually resolves within a cycle or two.
- Corpus luteum cyst: the post-ovulation structure that did not regress; usually resolves on its own.
- Endometrioma: a cyst formed by endometriosis tissue ("chocolate cyst").
- Dermoid cyst (teratoma): contains a mix of tissues; usually benign but often surgically removed.
- Cystadenoma: develops from cells on the ovary surface; can grow large.
- PCOS-related follicles: small follicles around the ovary edge, not true cysts.
Symptoms to know
Many cysts cause no symptoms and are found incidentally on imaging. When they do cause symptoms, the picture is usually one or more of:
Possible symptoms:
- One-sided lower-belly pain, dull or sharp.
- Pelvic pressure or bloating.
- Pain during sex, often in deeper positions.
- Changes in cycle length or flow.
- Sudden severe pain with fever, vomiting, or feeling faint (possible rupture or torsion).
When a cyst is an emergency
A few situations need urgent care, not "wait and see." Ovarian torsion (the ovary twisting on itself) can cut off blood supply and is genuinely time-sensitive.
Get evaluated urgently if:
- Sudden severe one-sided pelvic pain.
- Pain with fever, nausea, or vomiting.
- Lightheadedness, fast heart rate, or feeling faint.
- Severe pain that is the worst you have ever felt in that area.
Treatment paths
Most simple functional cysts get a "watchful waiting" plan with repeat imaging in 6 to 12 weeks. Hormonal contraception does not shrink existing cysts but can prevent new functional cysts from forming.
Larger, complex, or persistent cysts may be removed laparoscopically while preserving as much ovarian tissue as possible. Removing a cyst is not the same as removing the ovary; specialist surgery aims to keep the ovary functioning.
Tracking helps clarify what is happening
Logging when pain shows up, where, what cycle day, and how severe makes the pattern visible. That information helps a clinician decide between watchful waiting, imaging, or other steps.
A calmer frame
Hearing "you have a cyst" sounds alarming. In context, most cysts are part of normal ovarian function or benign growths. Cancer is uncommon, especially before menopause. Asking your clinician for plain explanations is reasonable, and a second opinion is okay if anything feels off.