Hysteroscopy is a minimally invasive gynecological procedure used to examine and treat lesions in the uterine cavity, which is operated vaginally to directly observe the lesions in the uterine cavity. Indications for hysteroscopy: 1, irregular vaginal bleeding; 2, postmenopausal vaginal bleeding; 3, repeated miscarriages; 4, IVF embryo transfer failure; 5, ultrasound suggests that there is an abnormal occupation of the uterine cavity (polyps, submucosal leiomyomas, placenta residue); 6, uterine anomalies are suspected. Hysteroscopic surgery: 1, separation of adhesions in the uterine cavity; 2, removal of uterine mediastinum; 3, removal of endometrial polyps; 4, removal of submucosal fibroids; 5, residual birth control ring, difficulty in removing the birth control ring. Pre-operative preparation: 1, preoperative evening fluids, preoperative fasting 6-8 hours; 2, preoperative vaginal scrubbing preparation; 3, sign the informed consent; 4, preoperative 3-5 days before the prohibition of sexual intercourse. Postoperative precautions: 1, postoperative vaginal bleeding, usually a week automatically stop, if the bleeding time is long, please consult a doctor in time; 2, postoperative ban on pelvic baths, prohibit sexual intercourse for two weeks; 3, postoperative antibiotics to prevent infection. Postoperative diet and activities: If the operation is carried out under general anesthesia, you can eat normally after you wake up from anesthesia, and you should get out of bed as soon as possible if you do not have dizziness and other discomforts.