What is the operation process of dimple forming? Subcutaneous ligation, similar to Song's ligation in double eyelid plasty, was also performed under local anesthesia. 1. Draw a short line with a length of 3~5 mm at a fixed point on the face, and stab a small hole at the upper and lower ends of the short line with the tip of a knife. Make a small vertical incision with a length of 3 mm at the position opposite to the facial fixation point in the oral cavity. 2. Use the straight needle of No.5 fine thread to pierce from the upper end of the small incision on the buccal mucosa in the oral cavity and pass through the upper end of the fixed line on the buccal skin. 3. Pierce the same needle and thread into the skin from the same point, walk 3 mm in the subcutaneous dermis, and then pierce it from the lower end of the skin fixation line. Then it penetrates into the skin for the second time from the second puncture point, and finally passes through the lower end of the small incision on the buccal mucosa in the oral cavity. 4. Pull a needle and thread. If there are dimples at the fixed point of cheek skin, silk thread can be ligated at the mucosal incision to make the subcutaneous dermis fit the buccal mucosa. 5. Sew a needle at the small incision of buccal mucosa. Note that subcutaneous ligation is not suitable for people with more cheek fat, and such people need to use an intraoral incision. Oral incision method 1, opposite to the fixed point selected before operation, made an 8 mm transverse incision on the buccal mucosa. 2. Separate the small incision with a small arc hemostatic forceps to expose the buccal muscle fibers. 3. First clamp the buccal muscle fibers in the incision with Alice pliers (pay attention to whether the facial muscles twitch when clamping, so as not to damage the facial nerve fibers), and then cut the clamped muscle fibers with bending scissors. 4. Sew the buccal mucosa in the oral cavity and the subcutaneous dermis at the fixed point of the cheek with a thin curved needle. 5. Finally, suture the wound in the oral cavity. Intraoral incision may damage facial nerve or parotid duct, so attention must be paid during operation.