Had fusion surgery in jan 2010 and then 2011 a spinal cord stimulator now the disk above my fusion is bothering me what could it be in a lot of pain?

Spin Cord Stimulator: Spinal cord stimulation (scs) has been shown to be effective in about half of the patients so fitted (read this===>http://www.Webmd.Com/back-pain/spinal-cord-stimulation-for-low-back-pain). They tend to show diminished pain relief, though, over time. The new pain may be due to a new herniated disk. I would make an appointment with your back surgeon and discuss next steps.

Discogenic pain: Following spinal fusion the adjacent disc above or below the fused site can bear the weight load causing back pain or recurrence of leg pain. Check the placement of the spinal cord stimulator with an xray to determine if the leads have moved if pain relief has stopped. A ct scan may be indicated to determine if there is re-herniation, spinal stenosis, spinal cord or nerve root compression.

Studies on outcomes of lumbosacral back fusions have shown a high incidence of arthritic degeneration above and/or below the site of surgery at 5 yrs. postop. The potential of an emerging disc protrusion or herniation cannot be ruled out. See a spinal surgeon and decide the next steps.