Surgery is recommended for chocolate cysts 6cm as ovarian cyst tip torsion, rupture and adhesions may occur during observation. Chocolate cysts, also known as endometriosis, is one of the main causes of dysmenorrhea in women, which can cause dysmenorrhea, chronic pelvic pain, pain during intercourse, infertility, and menstruation and menstrual cycle-related gastrointestinal symptoms, urinary symptoms. For ovarian endometriosis cyst diameter ≧ 4cm, infertility, pain medication is ineffective recommended surgical treatment. At present, the treatment of endometriosis cysts is recommended to timely surgical treatment, once diagnosed, it is recommended to be treated with medication under the guidance of a doctor as soon as possible to slow down the progression of the disease.