Hi and welcome to this forum Fogger, i am wondering if you have had a B12 test yet, as low levels can cause numbness and tingling, this site has been made by our B12 expert, Rose, it's well worth reading.
http://roseannster.googlepages.com/home
Also wondering if that neuro sent you for Quanitive Sensory testing. http://www.hmc.psu.edu/healthinfo/pq/qst.htm, usually done before any skin punch is considered.
good luck
Brian