Thanks for the query to H.C.M. Forum.
You mentioned that you are having spine tuberculosis
from one year ( Pott's spine).
One nodule is not resolving even after 4 months of treatment .
So advised surgery .
But you mentioned that even after 4 months treatment of tuberculosis at one site.
In my opinion please don't get surgery as this nodule will resolve after full course of treatment.
Upload latest Scan & Xray report of nodule.