Hyperalgesia = increased sensitivity to pain or enhanced intensity of pain sensation
http://www.merriam-webster.com/medical/hyperalgesia
This happened to all three of us, the back of our arms have spots that are numbish, sensitive, hard to explain but we all have it. Maybe nerves were stretched and didn't fully recover postop? It's not a problem for us unless a dog or a kid or unknowing person taps or touches just the wrong spot on the back of the arm....eeek.