Nano scarless double eyelid, that is, buried double eyelid, although it can improve a person’s eye condition and make the eyes look more beautiful, but there are also certain hazards, as follows: 1, the size of the eyes may be inconsistent after surgery, double eyelid asymmetry; 2, to the eye skin if the suture is not appropriate, it is likely to damage the periocular nerve, causing a certain impact on the patient’s vision; 3, some 3, some people choose irregular small beauty institutions, disinfection measures and operation techniques are not standardized enough, can not guarantee the safety of the candidates during the operation and the post-operative effect; 4, the effect is not lasting, with the passage of time, it is likely to occur because of the eye movement and the loosening of the line; 5, the post-operative wound cleaning and drying is very important, if the wound treatment is not clean or contact with water, easy to occur infection, resulting in the formation of wound scars If there is blood scab or secretion on the wound, sterile saline or medical alcohol can be used to wipe it. 6. Surgery generally results in a shallow and narrow upper eyelid crease, and if the operator’s technique is not well mastered, the upper eyelid crease can easily disappear, making it easier for the threads to loosen.