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Functional Ovarian Cysts - Topic Overview
SYMPTOMS & TREATMENTS
What is a functional ovarian cyst?
A functional
ovarian cyst 
is a sac that forms on the surface of a woman’s
ovary during
ovulation. It holds a maturing egg. Usually the sac
goes away after the egg is released. If an egg is not released, or if the sac
closes up after the egg is released, the sac can swell up with fluid.
Functional ovarian cysts are different from ovarian growths caused by other problems, such as cancer. Most of these cysts are harmless. They do not cause symptoms, and they go away without treatment. But if a cyst becomes large, it can twist, rupture, or bleed and can be very painful.
What causes functional ovarian cysts?
A functional ovarian cyst forms because of slight changes in the way the ovary makes or releases an egg. There are two types of these cysts:
- A follicular cyst occurs when a sac on the ovary does not release an egg, and the sac swells up with fluid.
- A luteal cyst occurs when the sac releases an egg and then reseals and fills with fluid.
What are the symptoms?
Most functional ovarian cysts do not cause symptoms. The larger the cyst is, the more likely it is to cause symptoms. Symptoms can include:
- Pain or aching in your lower belly, usually when you are in the middle of your menstrual cycle.
- A delay in the start of your menstrual period.
- Vaginal bleeding when you are not having your period.
Some functional ovarian cysts can twist or break open (rupture) and bleed. Symptoms include:
- Sudden, severe pain, often with nausea and vomiting.
- Pain during or after sex.
If you have these symptoms, call your doctor right away. Some ruptured cysts bleed enough that treatment is needed to prevent heavy blood loss.
How are functional ovarian cysts diagnosed?
Your doctor may find an ovarian cyst during a routine pelvic exam. He or she may then use a pelvic ultrasound to make sure that the cyst is filled with fluid. In a few months, after you have been through 2 or 3 menstrual cycles, your doctor will recheck you. The cyst is likely to go away on its own during this time.
If you see your doctor for pelvic pain or bleeding, you'll be checked for problems that may be causing your symptoms. Your doctor will ask you about your symptoms and menstrual periods. He or she will do a pelvic exam and may do a pelvic ultrasound.
How are they treated?
Most functional ovarian cysts go away without treatment. Your doctor may suggest using heat and medicine to relieve minor pain.
If a large cyst bleeds or causes severe pain, you can have surgery to remove it.
Your doctor may suggest that you take birth control pills, which stop ovulation. This may prevent new cysts from forming.
Frequently Asked Questions
Learning about ovarian cysts: | |
Being diagnosed: | |
Getting treatment: | |
Living with ovarian cysts: |
| By: | Healthwise Staff | Last Revised: October 12, 2010 |
| Medical Review: | Sarah Marshall, MD - Family Medicine Kirtly Jones, MD - Obstetrics and Gynecology | |
© 1995-2011 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.
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