It's not permanent. It can last for 2-3 years. Pressing double eyelids is actually burying double eyelids. Mainly sew a line on the upper eyelid and 4-5 stitches on the vulva. The operation is relatively simple, because it needs to be stitched, and double eyelids can be formed. If you want to do it, you'd better go to the plastic surgery department for surgery, and you need to pay attention to dressing change after surgery.