”A delicate smile and beautiful eyes.” Eyes are the windows to the soul, and having a pair of beautiful double eyelids with big eyes is the desire of many women. Thousands of those who seek perfection are keen to have double eyelid surgery to upgrade their beauty. What is the preparation needed before double eyelid surgery? What are the precautions? The first thing you need to do is to check the platelets and blood clotting time of patients with a history of bleeding tendency. 2, middle-aged and elderly patients need to measure blood pressure and do electrocardiogram if necessary, if there are mild abnormalities, before the operation to symptomatic medication. 3, the whole body examination, all laboratory tests, especially pay attention to whether there is easy bleeding tendency, avoid menstrual period. This is a very important point in the precautions for double eyelid cutting and should never be ignored. 4, 7-10 days before surgery to stop taking steroid hormones and aspirin and other anticoagulant drugs. 5, such as conjunctivitis, blepharitis, severe trachoma must be cured before receiving surgery.