i am suffering with tingling and stiffness in my fingers, after 2 years of being told it is arthritis, I have now seen a orthopaedic consultant who says I need a carpal tunnel operation in both hands, just a long shot but thinking back this only started when I started taking metformin, I have had blood tests for all vitamin levels, except for low iron, all else ok,has anybody got any ideas to help me, I am on a very long waiting list for the operations. Thanks