Most back pain is caused by muscle strain, trauma, or deformity.
About 10 percent of back pain is caused by a systemic illness. Back pain can develop anywhere from the top of the neck to the bottom of the spine. The pain can be in one small area or spread across a wide area. It may also spread out from a central point. Cause Back pain has many causes, including degeneration of vertebrae, infection, tumor, overuse, and trauma.