People who suffer from chronic back pain could have some deterioration of the discs in their spines. Some signals that this could be the problem include the loss of feeling in the legs. A laser spine surgeon NJ residents can visit will take x-rays to determine if the discs of the spine have been damaged in any way. When the discs begin to deteriorate they often pinch the nerves in the spine, causing the legs to go numb. In most cases, the doctor will recommend fusing the remaining discs in the area together to create more support and prevent the nerves from being pinched.