In fat transfer some of the fat will not take and the fat cell will die. The content is absorbed by the body and transported via the blood to the liver where they are metabolized. This is true in many surgeries, some fat cells do die, or injured due to surgery they are recycled and removed by...
When fat is grafted(transplanted from donor site to recipient site ) as opposed to "injected" like a filler, there is a natural biological process that must occur for graft take. In my practice, this generally causes much of the swelling, bruising is not as much of an issue. The goal therefore ...
The central forehead is not the ideal place to do fat transfer to.
Lumpiness is frequent. The lumps presumably are live fat cells and the only way to remove them is surgical. Steroid injection can affect the fat around the lumps and you become more lumpy.