1. Incision scar: The reason is incision infection, irregular incision edge, or patients with scar constitution. 2. The double eyelids are too wide, too narrow, too long, too short, and bilateral asymmetry: the reason is that the design line is too wide, too narrow, and too short, and the bilateral asymmetry is not cut according to the design line; The bilateral asymmetry of the patient itself is not considered in the design. 3. Triple eyelid formation: The reason is that the original double eyelid adhesion line is not separated, and the original double eyelid line and the newly designed double eyelid line form a triple eyelid, which is more common in the catgut embedding method; Excessive excision of orbicularis oculi muscle above the incision leads to the adhesion of upper eyelid skin and deep tissue to form a triple eyelid. 4, the appearance is not beautiful: the patient's eyes are short, forming the width of double eyelids and the eyes are round; The lower edge of the incision is not enough, and the double eyelids are bloated and unnatural; The appearance of double eyelids is not in harmony with the five senses. This is a common clinical manifestation of double eyelid surgery failure. 5. Blinking fatigue: The patient had mild ptosis or weak upper eyelid muscle strength before operation; Injury of levator palpebrae aponeurosis caused by too deep incision during operation; Early scar hyperplasia and contracture can cause. 6. The double eyelid line disappears: the reason is that the double eyelid design line is too low to form an inner double; Excision of orbicularis oculi muscle in front of meibomian is not enough to prevent skin from adhering to meibomian; Not fixed to the aponeurosis of tarsal plate during suture; The stitches are taken out too early and the bonding is not strong enough. 7, eyelid depression: orbital septum fat removal is too much.