Painless hysteroscopy needs to avoid menstruation as much as possible, pay attention to pubic cleansing and the use of antibiotics to prevent infection if necessary. 1. Painless hysteroscopy should pay attention to the best to do the operation within 3-7 days after the menstrual period is clean, irregular bleeding can be examined at any time, and hysteroscopy is usually not done during menstruation. 2. Before the operation, we should pay attention to measuring blood pressure, pulse, body temperature, understanding cardiopulmonary function and vaginal secretion, patients who have been diagnosed with endometrial cancer, vaginitis, acute endometritis, acute pelvic inflammatory disease, and cervical cancer can not do hysteroscopy to avoid adverse consequences. 3. Usually, when there is lesion activity or a lot of uterine bleeding, it is necessary to pay attention to the fact that hysteroscopy should not be done. There may be a small amount of blood secretion from the vagina within one week of the examination, so there is no need to worry about it, and the bleeding is usually cleared in 2-3 days, and the maximum length of bleeding is not more than half a month. After hysteroscopy, must keep the perineum clean, don’t swim, tub bath, and don’t have sex within 1 month, in order to prevent infection, and antibiotics can be given to prevent infection after the operation. If diagnostic scraping and other procedures are performed, postoperative attention should be paid to follow-up pathology results, etc.. Please consult your surgeon for specific precautions.