I have a failed surgery that was done 14 years ago. I get the burning, groin pain, itching, nurabness, and it gets worse as I push.
What was done to me was a lamenectomy (some spelling is wrong I am not a Dr) fusion L4-L5 L5-S1 discecomy, and instrumentation for those levels. I also have trouble walking at times. They wanted to go back in but I lost faith in the surgeon and no other Dr wanted me as a patient so I am on my own.
As for the hand burning sensation that sounRAB like a neck problem.
As for the fusion you have that failed I do not think they could do anything for that. The cage That is a tough situation. I do think I would go to another Dr for a consult just bring any and all films with you. I would not bring reports unless he request them.
If you decide not to have an additional surgery (I always felt that if the first one did not work then a second or third will not) then I would suggest pain management. Nerve pain can be controlled I am on Neurontin for the nerve pain Napoxen for the arthritis I ended up with and Morphine for the pain.
I still have pain when I push hard (yep still stupid LOL) and I need to rest some but I do get around. No bungy jumping even though I tell the Dr's I do lol
Like I said it is up to you but I know I would get another opinion as to what could possibly be done. I will say this when I went for another opinion I was dumped by the Dr I was seeing (not the surgeon)
Make sure you get any copies of any and ALL reports and X-Rays. You are entitled to them. Also get your surgical reports just in case you need them.
Hope this helps