I had a similar problem immediately after ACF of C5-7---
I don't know what the problem was (?inflamation, neuropathic pain, RSD?), but I couldn't tolerate air blowing on the ular portion of the left arm/hand (middle thru little finger)---it was awful

A boat load of neurotin calmed it down, although it was still bad for a couple of weeks, and I stayed on Neurotin for almost a year---I'm still mildly hypersensitive in that area, but the side effects of Neurotin (fatigue mainly) were worse than the pain

The MD should be able to assess and give you something---regular pain meds did little to help