An ovarian cyst is a sac that is filled with fluid or semi-solid tissue, similar to a blister that develops in or on an ovary.
Most ovarian cysts go away on their own in one to three months without causing any problems.
Only a cyst which lasts for a long time or causes significant symptoms will need medical attention. Some cysts do not cause any symptoms or discomfort at all, but may be discovered by a doctor during a routine exam. If this happens, you may need to be examined again in several weeks to make sure the cyst is not causing any problems that require treatment. In some cases, you may need treatment when the cyst is found. There are several different types of ovarian cysts.