Ovarian masses contain chocolate cysts. Ovarian masses can be categorized as benign masses such as chocolate cysts, ovarian mucinous cysts, or malignant masses of ovarian cancer. Chocolate cyst is a benign ovarian mass caused by stale blood accumulation in ovarian cysts, and its contents are mostly coffee-colored and sticky, which can lead to symptoms such as menstrual cramps, pain during sexual intercourse, pelvic pain and other symptoms manifested by women. Although it is a benign mass, there is a possibility of infiltration and malignant transformation. Ovarian mucinous cysts are also benign ovarian masses, whose typical symptoms are lower abdominal pain and infertility, and have a malignancy rate of about 35%, so patients should pay attention to them. Ovarian cancer, on the other hand, is a malignant ovarian mass that occurs in the ovary, which may be related to heredity or hormonal stimulation, etc. It has no obvious symptoms in the early stage, but in the middle and late stages, it will show symptoms such as weight loss, anemia, abdominal pain and irregular vaginal bleeding. Above, ovarian masses include but not only include chocolate cysts, no matter which kind of ovarian masses mentioned above, patients need to pay enough attention to it and actively cooperate with specialists for treatment.