When can facial fat transfer be reversed?

Often facial fat transfer can be reversed with syringe liposuction of excess fat. In certain areas, as in around the eye, the excessive fat deposit may have to be removed by a direct surgical approach. If the area where the excess fat has recovered with adequate softness, the liposuction can be performed with local anesthesia. Occasionally, a moderate amount of steroid can be used to reduce the thickening. Waiting a minimal of 3 to 6 months would be necessary before attempting removal. 
Christian Drehsen, MD

First, only 30% of the fat will survive and you need to give it time for the swealling to subside. This takes many months. Then, in certain areas, the transferred fat forms a capsule and it might be extruded or with the use of collagenase, shrunk. Some use very small cannulas to suction some of the fat.