Ovarian fluid accumulation generally refers to ovarian cysts, ovarian cysts have a variety of causes, if smooth and no adhesion with the surrounding tissues, considered benign tumors, there are the following cases: 1, ovarian plasma tumors, thin and smooth wall, most of the unilateral. 2, ovarian mucinous tumors, usually large size, diameter > 10cm, thick wall. 3, ovarian chocolate cysts, due to the ectopic growth of the endometrial tissue to the ovary, forming an accumulation of blood in the ovary or accompanied by light masses, clinical pain often even aggravated. 4, pelvic inflammation can also lead to localized accumulation of ovary, usually after antibiotic treatment, it will be better. In this case, there is accumulation of blood in the ovary or accompanied by light masses, and clinically there is often dysmenorrhea, even progressive aggravation.4. Pelvic inflammation can also lead to localized accumulation of fluid in the ovary, which usually improves and disappears after antibiotic treatment. The first three cases can be reviewed ultrasound and abdominal CT, clear to see whether the need for surgical treatment, of course, ovarian effusion does not rule out the occurrence of malignant tumors, but at this time you can hospitals to check the female tumor markers and epididymal protein 4, pelvic MRI clear, usually no vaginal bleeding and vaginal flow of yellowish fluids and other symptoms, the general likelihood of malignancy is low, do not have to worry about it too much.