Hysteroscopy is a new, minimally invasive gynecologic technique that is used to examine lesions in the uterine cavity. This new technology has been successfully carried out in our hospital for more than 10 years. The biggest advantage of hysteroscopy is that it can not only determine the location, size, appearance and scope of the lesion, but also make a detailed observation of the tissue structure on the surface of the lesion, and take the material or position the uterus for scraping under direct vision. It has greatly improved the accuracy of diagnosis of intrauterine diseases and has updated, developed and made up for the shortcomings of traditional treatment. It is currently the first choice for gynecological bleeding disorders, intrauterine lesions and infertility. Hysteroscopy is getting more and more attention, and many patients want to know the precautions related to hysteroscopy. It is important to be prepared before the examination and to pay more attention after the examination to ensure the results of the procedure. Cao Huabin of the Reproductive Center of Jiangxi Provincial Maternal and Child Health Hospital Hysteroscopy is usually painless. During the examination, patients only feel a feeling of lower abdominal distension or vague pain, but they can tolerate it. For patients who are more nervous or for other special reasons, intravenous anesthesia can also be used, i.e. painless hysteroscopy. Precautions before examination: Hysteroscopy is usually best performed within 3-7 days after menstruation, and for patients with irregular bleeding, the examination can be performed at any time after the blood stops. Sexual intercourse is prohibited after menstruation, and hysteroscopy can be performed after pregnancy is excluded. 1.The following preoperative examinations should be done according to the need: infectious disease examination (Hepatitis B, HIV, HCV, RPR), electrocardiogram, coagulation function, blood routine and blood group, cervical cancer prevention examination, gynecological ultrasound, etc. Biochemical examinations including blood sugar and lipids are necessary. 2.Blood pressure, pulse and temperature should be taken before surgery to understand the cardiopulmonary function and vaginal cleanliness. 3. Hysteroscopy is not recommended for those who have been diagnosed with intrauterine cancer, acute genital inflammation (acute endometritis, adnexitis and pelvic inflammatory disease) or cervical cancer or severe cervical stenosis during pregnancy to avoid adverse consequences. 4. Generally, hysteroscopy is also not recommended when the lesion is active or when the uterus is bleeding heavily. Unless there is a medical need. Precautions after hysteroscopy 1. There may be a small amount of bloody vaginal discharge within a week after the examination, do not worry too much. 2. Keep the perineum clean after hysteroscopy, and do not have intercourse or take a tub bath for two weeks to prevent infection. 3.After the examination, give antibiotics to prevent infection if necessary and treat the original disease.