hello, thank you for your question. The reasons for double eyelid surgery's failure are as follows: 1. Its own objective reasons. 2. The skill and experience level of plastic surgeons. 3, plastic surgery hospital health and disinfection is thorough. 4. double eyelid surgery is a minor operation that is difficult to control. In order to avoid the failure of the operation and make an ideal double eyelid shape, we must choose a professional plastic surgery hospital and a professional plastic surgeon to perform the operation.