I have had numbness, tingling, cold in the hand and fingers of left hand since last September (for 4 months).  My family doctor thinks it is the result of mild strokes and TIAs I have experienced over the past year.  My neurologist said it was caused by carpal tunnel syndrome and performed surgery six weeks ago.  The numbness and cold have still not gone away.  Could their be any other causes for these symptoms?  If it is the result of a stroke will I have this discomfort the rest of my life or how long will it take to heal?
The tingling and numbness you feel might be due to your previous strokes and Ties before. That can improve for 6 months to a year after the last stoke/TIA. After that there would be minimal improvement to none. You can also have your blood sugar checked just to be sure this is not the cause. Are your symptoms constant? Or is it aggravated by any position of your hand? Carpal tunnel can also have some residuals even after surgery. Was there any improvement after? Even just a decrease in intensity, duration or frequency of your symptoms?