The soft tissues of the face do not sag after proper cheekbone and zygomatic arch surgery. It is true that there are many cases of post-operative sagging due to bad surgery in our society, and even some doctors believe that post-operative sagging is inevitable, which sounds almost as unbelievable as if you drive a car that will surely hit a telephone pole. There are four main reasons for sagging: 1. The surgical plan is too old or designed wrongly, resulting in the position of the zygomatic arch shifting down after surgery. 2. Intraoperative fixation was not done well, and the zygomatic bone position shifted down after surgery. The bone was fixed during surgery, but the bone healed poorly and the zygomatic bone position shifted downward. 3.Soft tissue damage is too large, resulting in the overall downward shift of soft tissue after healing. 4. Impaired function of facial expression muscles, especially smile changes, and limited lifting of the corners of the mouth when smiling, resulting in a sagging appearance. The above mentioned are the common reasons, as for the uncommon reasons, because our country’s cosmetic surgery industry is uneven, a variety of strange failure cases are not uncommon, that I am afraid to analyze separately. A successful zygomatic arch and zygomatic bone surgery requires: 1, excellent surgical design plan. 2, good fixation. 3, the smallest possible soft tissue trauma and the complete protection of the expression muscles. For patients with some original sagging, a face lift can be done at the same time. Not only will the surgery not sag, but it will also lift and give a more youthful appearance. For a correct and high quality surgery, the post-operative recovery will leave only a more beautiful face and a better life.