Most ovarian cysts don’t need treatment at all. Simple, fluid-filled cysts smaller than 5 cm typically resolve on their own within two to three menstrual cycles. When a cyst does need attention, the approach depends on its size, type, symptoms, and whether you’re pre- or postmenopausal.
When Cysts Resolve on Their Own
The majority of ovarian cysts are functional, meaning they form as a normal part of ovulation and disappear without intervention. For premenopausal women with simple cysts under 5 cm, the American College of Radiology recommends no follow-up imaging is even necessary if the ultrasound was high quality and you have no symptoms.
Cysts between 5 and 7 cm are a different story. These are typically monitored with yearly ultrasounds to make sure they aren’t growing. Simple cysts up to 10 cm can still be safely watched with repeat imaging rather than surgery, even in postmenopausal patients, according to guidelines from the American College of Obstetricians and Gynecologists.
For postmenopausal women, the monitoring schedule is tighter. A cyst under 5 cm is usually rechecked with ultrasound in four to six months, along with a blood test called CA-125 that helps screen for ovarian cancer. If the cyst hasn’t changed and the blood test is normal at the follow-up, you’ll be rechecked once more at a similar interval. If everything stays stable, you can typically be discharged from monitoring entirely. Postmenopausal cysts smaller than 1 cm don’t require any follow-up imaging.
Managing Pain at Home
Ovarian cysts can cause a dull ache or pressure in your lower belly, particularly around your period. Over-the-counter anti-inflammatory pain relievers like ibuprofen and naproxen are the standard recommendation for mild to moderate cyst pain. These work by reducing the production of chemicals called prostaglandins that drive pain and inflammation. A heating pad on your lower abdomen or a warm bath can also help ease discomfort while you wait for a cyst to resolve.
What Birth Control Pills Can and Can’t Do
There’s a persistent belief that hormonal birth control can shrink an existing ovarian cyst. It can’t. A review of five clinical trials found no benefit of oral contraceptives over simply waiting when it comes to making a current cyst go away faster.
What birth control pills are very good at is preventing new cysts from forming. By suppressing ovulation, they reduce the risk of developing ovarian cysts by roughly 78% compared to not using contraception. Your doctor may prescribe them after a cyst resolves to lower your chances of a recurrence, especially if you’ve had cysts repeatedly or have experienced a complication like ovarian torsion. Other hormonal options that suppress ovulation, such as certain injectable contraceptives, work similarly for prevention.
When Surgery Becomes Necessary
Surgery is generally considered when a cyst is larger than 5 cm and isn’t resolving, when imaging suggests the cyst has complex features (thick walls, solid areas, or internal blood flow), or when a cyst is causing significant symptoms. Cysts larger than 7 cm typically require either advanced imaging like an MRI or surgical evaluation, and referral to a gynecologist is standard at that point.
The most common procedure is an ovarian cystectomy, which removes the cyst while preserving the ovary itself. When possible, surgeons perform this laparoscopically through a few small incisions. Recovery from laparoscopic surgery is relatively quick: most people return to work and light activity within one to two weeks, with full recovery in about three weeks.
Some cysts require open surgery through a larger abdominal incision, particularly if the cyst is very large or there’s concern about cancer. Open surgery means a significantly longer recovery. Expect at least six to eight weeks of activity restrictions, and full recovery can take up to 12 weeks. Surgeons aim to preserve the ovary whenever possible, removing the entire ovary only when absolutely unavoidable.
Emergency Warning Signs
Two complications can turn an ovarian cyst into a medical emergency: rupture and torsion.
Ovarian torsion happens when a cyst causes the ovary to twist on its blood supply. The hallmark symptom is sudden, severe pain in your lower abdomen, often accompanied by nausea and vomiting. The pain is usually sharp and stabbing, though it can be dull and crampy. It may stay in your lower belly or radiate to your thighs, sides, and lower back. Some people experience intermittent pain that comes and goes as the ovary partially twists and untwists.
If the blood supply stays cut off, the ovarian tissue begins to die. Warning signs of this progression include fever and abnormal vaginal bleeding or discharge. Torsion requires emergency surgery to untwist the ovary, and the goal is always to save the ovary rather than remove it. Importantly, normal blood flow on an ultrasound does not rule out torsion. One study found normal arterial flow in up to 60% of surgically confirmed torsion cases, so imaging alone can be misleading.
A ruptured cyst typically causes a sudden sharp pain that may be followed by dull, steady discomfort. Most ruptured cysts resolve without intervention, but if there’s significant internal bleeding, you may feel dizzy, lightheaded, or faint. Get to an emergency room if you have sudden severe abdominal pain, especially if you already know you have an ovarian cyst.