Welcome to NeuroTalk:

I would get your B12 levels in numbers, to see if you are below the new recommended low of 400pg/ml. Most labs report levels of 200 as "normal".... and they are not.

Also I would look to your daily routines. Soaps you use, things your hands are exposed to. Do they burn more at night? If so wearing the splints for carpal tunnel may help at night.

Are you on birth control pills? Those deplete lots of nutrients. If you are I can get you a list of those. Hormones in women and pregnancy can cause compression of the carpal tunnel in some women.

Do you lift weights or go to a gym or do something strenuous with your hands? Do you have loss of strength in your hands at all? Keep a journal and see if certain foods trigger you... the nightshades in particular can cause lots of burning in some people. (potatoes, tomatoes, peppers, eggplant and some hot seasonings, and paprika).

Some jobs like Pharmacy technician or Pharmacist that require opening safety caps on bottles all day long can really aggravate the carpal tunnel in the wrist. You can tap the inner wrist, with a wooden spoon, about an inch below the thumb and if you get tingling sensations, that is Tinel's sign...that shows you have some compression going on.