Welcome to NeuroTalk:

I have some questions for you....

Do you know what your B12 test was in numbers? What supplement do you use, and its dose?

Also on your CBC ...what was your MCV result? This marker will show beginning highs (sometimes just below the high from the lab) that indicates borderline B12 deficiency. Many doctors ignore this value...anyway. That is old information and they don't know that either.

Burning only occasionally suggests a food intolerance. Nightshade veggies (chilis, hot sauces, tomatoes, potatoes, peppers) will cause this in some people. Also consuming MSG will do a number on PN symptoms and flare some people. MSG is in many processed foods, and most restaurant foods.

Some people burn from beer and wine...due to the congeners in them and sulfites, and yeast content. Chronic alcohol also can be a culprit.

If you keep a log of foods eaten that day or the day before the burning, and also of your activities, shoes worn etc..you may find a trigger there. If you have elevated antibodies like MGUS ...high fat intake (like ice cream) or other high fat products can thicken the blood and cause circulation issues in the feet, until the fat is cleared. If you get dehydrated also, you may get burning as the blood thickens. Pre-diabetes is also a culprit so sugar and high carb intake may cause foot symptoms and hand symptoms.