The first thing that should be clear about this question is why we should do facial fillers. If the face is obese, we should do facial fat reduction rather than filler. If the obesity of the whole body is serious, the face will also be obese in the same proportion, and after a certain degree, it will produce sagging. For facial fat filling, it is usually for the depressed parts of the face, and after filling, it will not cause problems such as facial sagging and sagging. For example, for the filling of tear troughs, the location of the filler must be precise, how much is needed on each side of the depth, and the amount and location of the filler will be slightly different due to different materials, which needs to be mastered by your doctor. For nasolabial folds, it is important to fill the vertical part of the nasal base and then treat the superficial layer of the skin, the dense part of the nasolabial folds. Do not go to the outer part of the filler, nor do you need to tie it, if after forming a channel, there is a possibility that the filling material will run to the upper side, so the location of the filler must be precise and the level of the filler must be refined for the filling effect to be good. In addition, the doctor will precisely grasp the amount of filler needed, and will not say that the filler will not be aware of the sagging of the face. The amount needed for partial filling to the point of sagging is very large, and normal doctors will not make such a mistake, so there is no need to worry.