Generally speaking, self-fat itself is a relatively soft tissue, and this kind of fat cells are active, and when the fat survives it will have the same properties as the original fat, so facial autologous fat transplantation will generally not result in stiff expressions. But after fat filling, the situation of stiff facial expressions is not excluded, what is the specific reason? Introduced as follows: 1, too much fat filling Too much filling will look very old, for example: the apple muscle is a more important position of the face, if too much filling, when doing expressions, the face muscles can not pull the apple muscle, it will look stiff and uncoordinated. So do not blindly pursue more, but the right amount to be beautiful. 2, has not recovered well Some people in the filler, the filler parts will have a hard feeling and look bulging, this is because it is still in the recovery period, so do not worry excessively. Generally 3-6 months to recover more natural. 3, the doctor’s technology is not up to the doctor needs to know the skin layer well, so that the fat can be filled to the appropriate level accurately. Therefore, an experienced doctor has a great guarantee for the post-operative effect. Finally, it is recommended that you must choose the right doctor and do a good job of pre-operative communication. It is recommended that a small number of times, too much filling, fat can not survive or absorbed, it is likely to cause hard lumps and unevenness.