Friends who want to improve the shape of chin can choose to inject chin pads. There are many kinds of injections of chin pads, and different injections have different effects. After injection, a satisfactory chin shape can be achieved through expert shaping. What are the methods of chin pad injection? 1. Long-acting injection gel Long-acting injection gel is used to fill cavities, eliminate wrinkles and pad chin. Its advantage is that it will not be absorbed by human body, and its effect is lasting. Even if the process of laser cosmetic injection will affect the dermis, it is not suitable for the application of injecting long-acting gel. Therefore, it is best to communicate with your doctor before using long-acting gel. Second, hyaluronic acid and collagen injection 1), a small amount of hyaluronic acid or collagen is injected into the chin, and there is no wound after chin pad surgery, and there is no need for recovery period. After the chin is slightly elongated, the face will have an elongated visual effect, as if losing one kilogram. Moreover, hyaluronic acid and collagen injection can also be injected into the dermis, which also modifies the situation that the chin has pits or dimples due to aging. 2) At present, the injection material for chin pad is hyaluronic acid injection method, and macromolecular hyaluronic acid is used. Because hyaluronic acid particles are larger, the absorption time is prolonged, and the maintenance time can be extended to more than two years. Hyaluronic acid is usually injected about two or three CC, and the chin is elongated by 0.2 cm to 0.3 cm, which will have obvious visual effect of lengthening the face.