Hi, thanks for writing to HCM.
Generally, ACDF (anterior cervical decompression & fusion) yields excellent results.
As you are having pain along with burning sensation, there could have been some compressive element left out.
The other possibility for persistent pain at the operation site is INFECTION.
So, you need certain blood investigations & xrays of the cervical spine
to ruleout infection.
scan is needed to evaluate other causes.
I suggest you to consult a spine surgeon
with good reputation and follow his advice accordingly.
Hope this information is helpful. Good day