I have tingling sensations in my hands/legs/feet & face. The tingling sensation is constant in my legs and feet which when severe can cause burning in my feet and toes. The tingling in my face is more common than my hands. The tingling in the face used to just be in the chin, it has now spread to the nose and forehead. When severe it leads to burning in the lips. I have spinal stenosis and had cervical fusion surgery on c3/c7, the tingling in the hands still persists but not as often as it used to. I also have stenosis and bulging at L2/L5 and L5/S1. I had an MRI of the brain that came back normal. What causes the tingling?