If your MRI of brain and spine is fine that means there is not any mechanical thing troubling your nerves and causing this pain and numbness
. If I think it is because of your long standing diabetes
, eventhough your blood sugar control is very good, then you need to take medications for the same which will certainly improve your symptoms. See a doctor with expertise in treating diabetes for the same. Also, if the Neurologist
has missed out on any of the following tests- Serum Calcium, Phosphorus, Albumin
, Alkaline phosphatase
, TSH, and Vit B12, do get them done as disturbances in these parameters are likely to cause these body symptoms. All the very best.