Chocolate cyst of ovary is a kind of endometriosis. Because the ectopic endometrial tissue flows into the pelvic cavity along the fallopian tube and is planted on the ovary, it gradually forms a bloody cyst with solidified blood clots and the color is like chocolate, so it is commonly known as chocolate cyst of ovary. The following are introduced by experts in obstetrics and gynecology during the Eighth Five-Year Plan: 1. Dysmenorrhea: Dysmenorrhea is the most obvious symptom of endometriosis. If a female friend has dysmenorrhea, don't go to the hospital for examination in time and make sure the cause is treated. Second, pain during sexual life: patients with ovarian chocolate cyst will have pain during sexual life, which may be accompanied by a little bleeding. Third, you can touch the tender nodules: Some patients with ovarian chocolate cysts can touch the tender nodules on the uterine rectal fossa or sacral ligament. 4. Sudden and severe abdominal pain: The main manifestation is sudden and persistent severe pain in the lower abdomen, but there is no abnormal vaginal bleeding. Pain often starts from one side and then spreads to the whole lower abdomen. The degree of acute abdomen caused by other reasons often exceeds that of gynecological acute abdomen, and it is often accompanied by peritoneal irritation symptoms such as muscle tension and rebound pain. Experts especially remind you that if you find any abnormality, you should go to a regular hospital for relevant examination in time. Once diagnosed with ovarian cysts, we should actively treat them.