After cesarean section, the occurrence of endometriosis needs to be analyzed in relation to the specific location, including endometriosis at the abdominal incision and pelvic endometriosis. Endometriosis occurs when the endometrial tissue is located outside the uterus, and the endometrium can invade any part of the body. 1. Endometriosis at the abdominal incision: endometriosis at the abdominal incision after cesarean section is mostly considered to be caused by the endometrial tissue planted at the incision during cesarean section, which can be manifested as pain at the incision during menstruation, and with the prolongation of time, there can be bluish-purple hard nodules locally, which can be removed by surgery. 2. Pelvic endometriosis: the etiology of the disease is unknown at present, there are planting theory, body cavity epithelial chemotaxis theory, induction theory, genetic factors and immune inflammatory factors, etc., the main manifestations of lower abdominal pain and dysmenorrhea, infertility, discomfort in sexual intercourse, menstrual abnormalities, etc., and the treatment can be through the drugs and surgery. If a woman develops endometriosis after cesarean section, it is recommended that she seeks medical attention in time, and under the guidance of the doctor, improve the relevant examinations and take appropriate treatment measures.