question: I am 46 yrs old, female. I have degenerative disks and 2 yrs ago had 3 cervical disks replaced with instrumentation. Now I am having very sharp pain and pins and needle sensation in my upper back and the left upper portion feels like my skin is numb and freezing cold. This pain wakes me up at night. What would cause this-it isnt going away and is more frequent. Thanks!