1 yr ago I underwent a bullhorn lip lift with a muscle plication. 6mm was removed . From the vermillion border to the base of the nares is significantly thickened. It is convex rather than concave. It is also extremely numb. The surgeon has repeatedly injected 5FU and steroids into the incision. No improvement. 1. What caused this? 2. Is there a treatment? 3. Will this get better? Thank you for any advice.