Facial lines are not smooth, so you can choose hyaluronic acid filling method to improve it. There are two main reasons why facial lines are not smooth. One is the bone, which can be improved by lowering the zygomatic arch. The other is caused by low fat content, which can be improved by filling autologous fat or hyaluronic acid. For serious cases, both methods may exist, so these two methods need to be combined, but you must go to a regular medical and aesthetic institution and stop strenuous exercise after surgery to avoid cracking the wound.