As you can see one side of my face seems to droop though there is no known medical cause I am aware of. Any suggestion? (photo)

This is becoming increasingly noticable to the point I avoid all cameras. I was hit across the face with a metal bar 25 years ago which required a plastic surgeon to repair as the cut between my eyebrows was very jagged. Could this be what created these changes and can it be fuxed? I have been in remission from AML since last year which resulted in Septic Shock and a month long induced coma, so I have little money for aesthetic concerns but I'm increasingly self concious. I'd appreciate any thoughts.

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