Due to the prevalence of cesarean delivery, the number of cesarean deliveries has been increasing since 1996 until recent years, and the number of patients with scar diverticula after cesarean delivery is also increasing. The specific clinical manifestations are as follows: 1. prolonged menstrual period and dripping 2. increased menstrual flow 3. post-coital bleeding 4. infertility and dysmenorrhea 5. Ultrasound indicates a wedge-shaped liquid dark area at the original cesarean scar and communicates with the uterine cavity. (i.e., there is a defect here.) 6. Hysteroscopy shows a fornix above the cervical canal (below the internal cervical os). There appear to be two uterine cavities and the fornix-like scar above the cervical canal is seen to be vascularized, sometimes with old blood collection. Sometimes there may be a combination of endometriosis lesions, sometimes inflammatory follicles or endometrial polyp-like tissue growths. (See the picture above, the top picture is the scar diverticulum, and the top of the diverticulum is the lower edge of the IUD) At present, more and more doctors and patients accept this disease, and after the exploration of hysteroscopic scar removal and laparoscopic scar removal, the transvaginal uterine scar removal promoted by Professor Yao Shuzhong of the First Hospital of CUHK in the past two years is gradually recognized by everyone, which is to remove the original scar after pushing up the bladder through the vagina and repair the scar again. After 3 years of clinical practice, it has achieved good clinical efficacy. We have performed this procedure in our hospital, and more than ten patients have undergone the procedure and achieved good clinical results, effectively solving the problem of long-term vaginal bleeding that leads to reduced quality of life.