This issue appears confusing. The lump likely is not Restylane itself. It is unlikely to be scar tissuue either. So, it makes it more important to know the nature of this mass.
You should obtain at least one more consultation to figure out the exact nature of this mass. You might even need to do an MRI.
Once its established that the mass needs to be removed the incision should be placed closer to the mass. If the mass is close to skin then incision on the skin and it should heal well. If mass is deep and easily palpable from inside the mouth then incision should be transoral (through the mouth).
Regards




