The main reason of square face is that the bilateral mandibular angle is too large or the masseter muscle is hypertrophy. According to experts from BK Plastic Surgery Hospital in South Korea, mandibular angle plastic surgery is to turn a square face into a melon face, which is the most thorough and effective face-lifting method at present. After the operation, women can look soft and beautiful. Experts from BK Plastic Surgery Hospital in South Korea said that there will be slight edema in the first two days after operation, and cold compress can accelerate the swelling and there will be no sequelae.