Uterine diverticulum is a complication after cesarean section, usually due to poor scar healing after cesarean section, the endometrium and myometrium are missing, the pattern of the uterus is changed, and an extra space is formed as a diverticulum. After the formation of diverticula, women may experience a series of clinical symptoms such as prolonged menstrual periods, dysmenorrhea, and pelvic pain. If a woman finds a diverticulum after a cesarean section, if she gets pregnant without treating the diverticulum, the uterine wall at the diverticulum will become relatively thinner as the fetus grows, and in late pregnancy, as the uterus grows and the lower part of the uterus elongates, there is a risk of a precursor uterine rupture in the diverticulum, and in labor, as the uterus contracts, the diverticulum cannot withstand the pressure of contractions during labor, and there is a risk of Uterine rupture may occur. Therefore, women with a history of cesarean section should go to the hospital promptly when they have symptoms such as prolonged menstrual periods and lower abdominal discomfort during menstruation, and once the diverticulum is diagnosed, they should follow the doctor’s advice to determine how to treat it and, if necessary, undergo hysteroscopic, laparoscopic or transvaginal surgery or open surgery to repair it.