People with long-lasting lower back pain often don't know why they hurt. Now it seems they suffer from a nerve problem that turns up the Read 'No-Cause' Back Pain Really Hurts online at WebMD. If you've got back pain, then you're probably reading this booklet because you want to get better and because you want to understand more about this problem. to wear and, on a plain x-ray, these can be mistaken as the cause of the back pain may be an independent cause of back pain), you should take extra People with long-lasting lower back pain often don't know why they hurt. Now it seems they suffer from a nerve problem that turns up the Read 'No-Cause' Back Pain Really Hurts online at WebMD. nonspecific back pain. Definition. Nonspecific back pain refers to pain in the back that is not caused by a diagnosed disorder, such as a ruptured disc. What is going on in the body? Nearly everyone has back pain at some time. The exact cause of back pain may be hard to find. Pain can come People with long-lasting lower back pain often don't know why they hurt. Now it seems they suffer from a nerve problem that turns up the Read 'No-Cause' Back Pain Really Hurts online at WebMD.