Before scraping the uterus if you choose painless anesthesia, you can not eat any food and water in the morning, so as not to food caused by anesthesia risk of producing accidents, causing respiratory depression performance occurs. Can not have intercourse within 2-3 days before scraping the uterus, so as not to affect the routine examination of leukorrhea on the day of scraping the uterus. Because mycobacteria trichomonas and bacterial vaginal inflammation is not directly scraping the uterus, the need for treatment, anti-inflammatory treatment for a period of time before the operation, so as not to cause upward infection, while sex after scraping the uterus will cause uterine infections and even uterine bleeding, pelvic inflammatory disease performance occurs. The day before the operation, you must pay attention to the vulva clean, wear easy to take off the underwear, ready to replace the underpants and sanitary napkins, can avoid the infection caused by cross-infection.