A uterine scar diverticulum is a depression where the uterine incision scar communicates with the uterine cavity after a woman has had a cesarean section, and is the result of poor healing of the uterine incision. When a woman has had a previous cesarean section, most of the patients’ wounds are located in the lower part of the uterus, and because the incisions in the myometrium do not line up well during the healing process, the uterine incision scars communicate with the uterine cavity to form a small compartment, which is the uterine scar diverticulum. Uterine scar diverticulum is a sequela of cesarean section and the patient may have prolonged menstrual periods and persistent unclean bleeding. If a woman becomes pregnant again and a fertilized egg is deposited in this location, the underlying meconium will continue to erode the uterus as the gestational sac continues to develop, causing uterine rupture, which is extremely risky at this point. Patients with uterine scar diverticulum can understand the condition of the uterine cavity and the size of the scar diverticulum through hysteroscopy, which can be treated through surgery. Commonly used surgical methods include electrocoagulation of the bottom of the scar diverticulum to destroy the inner lining of the diverticulum under hysteroscopy, and excision of the scar diverticulum with laparoscopy, and suturing. Once a woman is examined for uterine scarred diverticulum, she needs to go to the hospital in time for treatment.