Steroid fat atrophy is a well know complication with repeated subcutaneous injections. There is some anecdotal evidence that it may be due to precipitation of crystaline steroids that stay in the tissues. For this reason, it has been advocated that merely injection of saline into the affected area will dissolve the cystals and permit regrowth of fat cells inhibited by the steroids. I have tried this once, with questionable results, but it is certainly a benign technique.
Dermal fillers such as Restylane, Perlane, Sculptura can be used, but the results will obviously be temporary. A more permanent injectable like Artefil may also work, but its use will be off-lable and there are reported risks of chronic granulomas. I think fat injections may be your best bet, but the fat may disappear if it does not survive after the transplantation to your cheek. Repeat injections may be necessary.
I had a brow lift a 2 years ago and the tissue around my right eye socket has felt very tight, to the degree that I felt I couldn't open my eye all the way when I looked up. I asked the doctor if I might have adhesions or nerve damage and he suggested cortison shots along the nerve in my forehead leading to my brow. He made about 4 tiny injection both above and below the brow. 6 weeks later I now have an indentation on that eyebrow, like a frown crease, that slightly changes the shape of that brow. If this is tissue loss as I have lately read (I thought cortisone only dissolved scar tissue!), will this tissue regenerate?