Hysteroscopy is a minimally invasive gynecological treatment technique in which a slim hysteroscope with a light source is placed into the cervix and uterine cavity through the vagina and the video signal is amplified and transmitted to the monitor screen, which can visually and accurately determine diseases in the uterine cavity and is the preferred method for diagnosis and treatment of intrauterine lesions. With the popularization and application of hysteroscopy technology, more and more women are concerned about the precautions related to hysteroscopy, which are introduced as follows: Precautions before examination: 1. Hysteroscopy is usually performed 3-7 days after menstruation, but not absolutely. For example, patients with abnormal vaginal bleeding can also choose to perform it at a time when the bleeding is low, so that it is easier to find the cause of the bleeding. 2. During this menstrual cycle, sexual intercourse is prohibited before hysteroscopy to exclude the possibility of pregnancy. 3, routine gynecological examination before the operation, to exclude acute pelvic inflammatory disease, vaginal inflammation and other contraindications to the examination. 4. Patients with serious heart and lung diseases should be fully evaluated for cardiopulmonary function and no contraindications before performing hysteroscopy. 5.According to the doctor’s instruction, hold urine appropriately if necessary to facilitate intraoperative ultrasound monitoring. 6. Patients with a history of surgery such as myomectomy or uterine perforation within the last 3 months should not undergo hysteroscopy. Post-examination precautions: 1. There will be a small amount of vaginal bleeding within 1 week after hysteroscopy, if the vaginal bleeding is greater than the amount of menstruation, consult a doctor in time. 2. Keep the perineum clean after the procedure, and do not have intercourse, take a bath or swim for 1 month. If abdominal pain or fever occurs, consult a doctor promptly. 3. Take oral antibiotics as appropriate to prevent infection after surgery.