Well, the 'good news' is you found the E.M.G. to be uncomfortable. That means your nerve was much more active than mine was! I felt nothing until my neck.
You didn't say what sort of physical therapy was done after the transposition surgery. I credit my good outcome to p.t..
You say your arm is still very sensitive. What has been done to desensitize it? Anything?
Now that the nerve is buried under my muscles, keeping in mind that I am very tiny (4'11", 94 lbs) whenever I use my left hand alot, the nerve gets irritated and can ache terribly. Sometimes, I even get the nerve twitching. I seldom get the 'lightening bolt' pain anymore. When in this condition, the only things that truly help me with relief are Ibuprofen and my heating pad. I've also soaked my forearm in Epsom salt bath.
I awake every morning with tendonitis pain stemming from the 'back' of the elbow. For this, the only thing that seems to help is naproxen.
Both ibuprofen and naproxen are anti inflammatories, but one works for one type of 'pain' and the other works better on the other type of 'pain'. There was a period of time I was given Celebrex, and when that didn't produce much benefit, they tried Mobic. The point is, if we don't try different meds, we won't know what truly helps.
Ibuprofen helps my headaches and other 'aches'. Naproxen helps my tendonitis and bursitis. Nothing helps the 'nerve' pain much except ice. Whether it's in my arm or shooting down my leg.
Your nerve could be entrapped again, by scar tissue this time. I've heard the term 'tethering' in here, not sure if it applies, but something to look at.
I would get a consult with a neurologist as well as an upper extremity specialist. While the prospect of another E.M.G. isn't appealing, it may be the only way to figure out what is going on and where!
multiple surgeries for rotator cuff both shoulders with residual chronic impingement syndrome, ulnar nerve transposition, carpal tunnel release, wrist ganglionectomies/denervectomies/tenolysis, multiple herniated discs, tarlov cyst, whiplash, bursitis of hips, tendonitis, torus, 3rd degree shoulder separation, torn labrum, ovarian cysts, fibroid tumors of the uterus