I’m always nervous before a procedure including novocaine for dental procedures. My neuropathy flared in January after I had a tooth pulled which I attributed to inflammation. I spoke to the oral surgeon prior to my implant surgery about concerns but did ok. I just had a colonoscopy and did fine with the anesthesia as well. Talk to the doctor, meditate/relax as best you can prior and I’m wishing you the best. Btw I had most of my thyroid removed surgically and then radioactive iodine finished it off. This was years before neuropathy hit, however. Sending healing to you.