Can I "fix" my cheek dip? (photos)

I have a dip across my cheek, on one side of my face, under my eyes, along the zygomatic muscle. It is very obvious at times and makes me self-conscious. There appears to be "swelling" above it, which I think was caused by filler many (many) years ago. Everything has been dissolved *very* thoroughl, but the swollen area remains. I know that I could get filler put in this area, but I have a "fat face" already and don't wish to over-fill and would prefer to fix surgically. What are my options?