To make the forehead fuller, the most common way is microplasty, injecting certain filling materials into the forehead, there are two kinds of filling materials to choose from: the first material is hyaluronic acid, hyaluronic acid is divided into three kinds of small molecules, medium molecules and large molecules, forehead augmentation generally with medium or large molecules of hyaluronic acid, because their degree of cross-linking, that is, higher viscosity, so the stability and filling effect will be better. The advantage of hyaluronic acid filling is that it is easy to operate and the recovery time is relatively fast. But there are also two disadvantages: 1, it may cause vascular embolism in the forehead, 2, after filling the forehead, hyaluronic acid will slowly metabolize, generally about six months, the effect may be missing, so you need to inject filling again. The second material is autologous fat, that is, the fat accumulated in the body, such as buttocks, abdomen or inner thigh fat is taken out, and then injected into the forehead. Since the fat is your own, there will be no rejection reaction, but not all of the fat filled into the forehead will be viable, and the non-viable fat may liquefy and the patient may have pain, pus or fluid flow.