The main manifestation of a ruptured chocolate cyst is severe abdominal pain, which may be accompanied by anal swelling, nausea, vomiting and other discomforts. Chocolate cysts are ectopic in the ovary of the endometrium with the menstrual cycle and bleeding, the formation of cysts containing old blood inside. Chocolate cysts grow in size as the disease progresses, and rupture occurs around the time of menstruation or during menstruation, when the cysts are congested with blood. After the rupture of a chocolate cyst, the fluid inside the cyst can flow into the pelvic and abdominal cavities, causing sudden and severe abdominal pain, which may be accompanied by nausea, vomiting, anal distension and other uncomfortable symptoms, and the patient may also have signs of acute abdomen, such as a slab-shaped abdomen, severe rebound pain, and so on. Patients with chocolate cysts who have the above symptoms and suspect rupture of the cysts should seek medical attention in a timely manner and under the guidance of the doctor to carry out the appropriate treatment, and should not make blind judgments on their own, so as not to delay the condition.