Lupin,
Be sure you get tested for Sjogren's Syndrome. I have a similar feeling in my tongue and I'm positive for Sjogren's. Sjogren's is an autoimmune disease and autoimmune neuropathies can cause the burning, tingling, etc. in hands as well as feet. My neuropathy covers the area from my toes to mid back and also my hands.

Sjogren's is also sometimes diagnosed as MS. The symptoms are very similiar.

Billye