What Causes Shoulder Pain With Numbness And Tingling Sensation In Hands?

hello, i hope you can help me, what it is, i recently had a lumbar microdisectomy operation on my lower back, i think thats what it was called, due to a ruptured disc. it has now ruptured again and they are telling me i need to have the operation repeated, as i have severe pain in my lower back and legs etc, with the numbness and tingling etc.

i have also been told about spinal fusion, but for the last few weeks i have been experiencing severe pain and aching in my shoulder also, which clicks qute loudly and painfully and grinds, it also causes my hand to go numb alot and is painful, i also get the pins and needles sensation.

can you possibly give me any idea as to why this is happening.

thankyou.