1.Abnormal uterine bleeding (AUB): The typical manifestation is prolonged menstrual period and postmenstrual spotting bleeding lasting 2 to 12 days. The reason is that menstrual blood residues accumulate in the diverticulum area and are not discharged smoothly, and are dribbled out due to the change of position. The severity of symptoms is related to the size of the diverticulum, and larger ones can accumulate more blood, which in turn leads to longer postmenstrual dribbling bleeding. Dysmenorrhea and pelvic pain: 53.1% of patients with cesarean diverticula have dysmenorrhea and 39.6% have chronic pelvic pain, and the symptoms are more severe in those with deeper and wider diverticula. Structural abnormalities of the uterus and local infiltration of lymphocytes may be factors leading to dysmenorrhea and pelvic pain. 3, infertility: persistent menstrual blood outflow affects the formation of cervical mucus and sperm transport; the diverticulum is continuously in a state of chronic inflammation.