Cheek Swollen 2 Years After Facelift

Your best best is to consult with several top surgeons who have considerable experience in revisional facelift surgery.

Your problem at this point is complex and will require great experience and judgment.

The correct solution (if there is a good one) will likely jump out at you during on of your consultations.

Lifting the face is a revealing phenomenon.  The true bone structure that was apparent when young may have been hidden by laxity and drapes of skin.  Buccal (cheek) fat may be more excessive on one side, but the asymmetry was concealed by the laxity.  Subclinical hematoma may have stimulated scar tissue formation and be a contributing factor.  History is important and is considered, but what matters more than how you got here is where you are.  Something as simple as one sided buccal fat removal under local anesthesia with no external incision may be all or part of the cure.  Have a consult with a board certified plastic surgeon.

I am sorry to hear that it has take so long for the swelling to resolve.  You should see a surgeon who is an expert in facial surgery to recommend your best options.  Good luck.