As you know, anything bilateral in the extremities should cause a good bit more concern than when just one arm is affected. For obvious reasons, the spinal cord itself has to be ruled out first before other options are entertained.
Hopefully, as Garrett mentioned, the worst that happens is that you give up nightshades, or DL's, or both.
However, while you experiment with his suggestions, I would not be too far away from an updated MRI to check on stenosis from an adjacent or nearby spinal level.
"And if a frog had wings it wouldn't bump his ass a hoppin'!"
- The wisdom of Nathan Arizona