Ovarian Cysts: Types, Symptoms, and Treatment
Ovarian cysts are extremely common, often cause no symptoms, and the large majority resolve on their own without treatment. Most are monitored with a repeat ultrasound rather than treated immediately, and only a minority ever need surgical removal.
Types of ovarian cysts
Functional cysts — follicular cysts and corpus luteum cysts — are by far the most common type, forming as a normal part of the menstrual cycle when a follicle doesn’t release an egg or doesn’t dissolve afterward as usual. These typically resolve on their own within a cycle or two without any treatment. Other, less common types include dermoid cysts, which develop from cells present from birth and can contain a mix of tissue types; endometriomas, cysts that form when endometriosis affects the ovary; and cystadenomas, which develop from ovarian surface cells. Each type looks somewhat different on ultrasound, which is part of how they’re distinguished from one another.
Symptoms
Most ovarian cysts cause no symptoms at all and are found incidentally during a scan done for an unrelated reason.
When a cyst becomes an emergency
The exception to the generally low-concern picture above: a cyst that ruptures or twists (ovarian torsion) can cause sudden, sharp, one-sided pain that comes on abruptly, sometimes with nausea or vomiting.
How cysts are monitored and treated
For most functional cysts, watchful waiting with a repeat ultrasound after a cycle or two is the standard approach — the large majority resolve on their own in that time, and no treatment is actually needed.
Are ovarian cysts cancerous?
This is, understandably, the real question behind most ovarian cyst searches, and it's worth answering directly: the vast majority of ovarian cysts are entirely benign, particularly in premenopausal women, where functional cysts related to the normal cycle account for most cases.
Cysts and fertility
Most ovarian cysts have no effect on fertility, particularly functional cysts, which resolve on their own without lasting impact. Endometriomas are something of an exception — depending on size and whether both ovaries are affected, they can have a more direct relationship with fertility, which is factored into treatment planning if you’re also trying to conceive. This is exactly the kind of detail worth raising specifically if fertility is a current concern, since it can shape whether watchful waiting or more active treatment is the better path for your situation.
Recurrent cysts
Some people develop cysts repeatedly, cycle after cycle, which understandably raises the question of whether something more is going on beyond ordinary functional cyst formation. Recurrent cysts are worth a slightly broader look — checking for an underlying pattern like PCOS, which can produce a similar picture on ultrasound, or considering whether a particular type of cyst, like an endometrioma, is the recurring issue rather than a new functional cyst each time. The management approach shifts a little in this situation, from repeated one-off monitoring toward understanding the underlying pattern and addressing that directly.
Frequently asked questions
No — most functional cysts resolve on their own and are simply monitored with a repeat scan. Surgery is reserved for cysts that persist, grow, or show concerning features.
Some types, particularly those tied to hormonal activity, can occasionally affect cycle timing, though many cysts have no effect on periods at all.
Not always, but sudden, severe, one-sided pain is exactly the pattern worth being seen for urgently, since a ruptured or twisted cyst is one of the more time-sensitive causes to rule out.
In the large majority of cases, no — most cysts, especially in premenopausal women, are benign. Certain ultrasound features or a cyst found after menopause warrant closer evaluation, which your doctor will explain if it applies to your specific finding.
Usually, yes — most cysts don’t affect fertility. Endometriomas are a more specific case worth discussing directly if you’re also trying to conceive.