Ms. Wang, 35 years old, was recently admitted to our gynecology department with “vaginal bleeding cause to be investigated, hemorrhagic shock, hemorrhagic anemia” due to “increased menstrual flow for one year, heavy bleeding during menstruation for one day, fainting twice”. She was given fluids, hemostasis, and pro-uterine contraction drugs, but the bleeding did not stop. After blood transfusion to improve her general condition, she was given hysteroscopy and found a submucosal myoma of about 3cm in diameter in the uterine cavity. Hysteroscopy is an advanced device for diagnosis and treatment of diseases in the uterine cavity, which can clearly observe various changes in the uterine cavity and make a clear diagnosis. The hysteroscopy technique can directly examine the lesions in the uterine cavity, locate and collect the lesion tissue for examination, which is accurate, timely, comprehensive, intuitive and can detect cancer at an early stage; it is feasible to intubate the fallopian tube, check the patency of the fallopian tube and unblock the interstitial part of the fallopian tube, which is accurate and effective; the hysteroscopy can remove the endometrium, submucosal fibroids, endometrial polyps, uterine longitudinal septum, uterine adhesions and remove foreign bodies with good efficacy. It is effective, less traumatic, less bleeding, less painful, quicker recovery, does not affect ovarian function, and preserves the physiological integrity of the uterus with less trauma. It is less traumatic. In addition, hysteroscopy can be used to examine the vagina and uterine cavity of young girls and unmarried women to detect abnormalities and treat them accordingly. The hysteroscopy can also be used to diagnose the causes of infertility and to correct uterine malformations and, if necessary, to diagnose endometrial cancer at an early stage. Indications for treatment Unblocking of the tubal opening Selective tubal cannulation and lavage test Foreign body removal Hysteroscopic injection for tubal pregnancy Indications for hysteroscopic surgery Endometrial resection Endometrial polypectomy Myomectomy Submucosal myoma less than 7 cm in diameter, intermyometrial myoma protruding into the uterine cavity, about 4-5 cm in diameter, cervical myoma less than 3-4 cm in diameter 4 cm in diameter. Longitudinal hysterectomy Dissection of adhesions in the uterine cavity Excision of intracervical redundancies