First, the most basic guarantee is to choose regular plastic surgery institutions and professional plastic surgeons. Second, although cutting double eyelid surgery is a small minimally invasive operation, it is not suitable for everyone. Be sure to have a comprehensive examination before operation to ensure that you belong to the group suitable for double eyelid surgery. If your physical condition is not suitable, there is no safety at all. Third, we should make good preparations before operation. For example, do not take aspirin-containing drugs for two weeks before surgery. Female friends should not wear makeup before surgery, avoid menstrual period, and male friends should quit smoking one week before surgery. These small details have a great influence on the safety and effect of open canthus surgery. Fourth, do a good job in postoperative care. For example, within 7 days after operation, try to avoid the surgical site from getting wet, ensure the surgical site is clean, prevent infection, and do not eat irritating food.