Chronic pain syndrome is a wide-sweeping term, often describing pain lasting more than three to six months or pain beyond the point of tissue healing. Some forms of chronic pain can be linked to an identifiable cause, like degenerative disc disease, spinal stenosis, or spondylolisthesis. Other forms of pain have no known or understood cause, such as fibromyalgia or neuropathic pain (nerve pain). Fighting chronic pain is a lifelong struggle for many.