It is best not to have any inflammation caused by virus before operation, such as folliculitis, furuncle, acne, acute ophthalmia, etc. In order to prevent infection, women can't have surgery during menstruation. It is best to take a bath the day before the operation. On the day of operation, wash away facial dirt and grease with soap before going to the operating table to minimize the number of bacteria. Before the operation, you should also cut your nose hair and clean your nose. There are other diseases in the body before operation, which leads to low resistance, and it is easy to cause infection during operation, which affects wound healing.