"Ovarian cyst" refers to a mass produced inside or on the surface of the ovary. The substance in the mass is usually a liquid, sometimes it may be a solid, or a mixture of liquid and solid. Ovarian cysts are usually small, similar to peas or cashews, and some cysts look like soft balls or even bigger. Of course, we should also pay attention to larger cysts, because ovarian cysts may also become malignant, and the mortality rate of malignant ovarian cysts is very high, so women should never "leave ovarian cysts unattended."