Under-correction or over-correction can occur in fat grafted areas. Although fat grafting is considered permanent, it is well known and documented that not all of the fat will survive in its new location. Typically, approximately 70% will survive, but this can vary from patient to patient. In some cases, multiple fat transfer sessions are needed to achieve the desired aesthetic effect. In order to help achieve that 70% survival, we ask that you don't smoke for six weeks prior to fat grafting and for six weeks after. This helps get better blood supply to the transplanted fat. Also, we ask that you don't put any direct pressure on the areas for six weeks.