Back pain may be the result of a retroperitoneal disease (duodenal ulcer, aortic aneurysm, pancreatic cancer, often with pain localized in the lumbar region of the back, but the movements in the back are complete and do not cause soreness!). Other causes may include a tumor of the spine; infection; pain associated with spondylosis or caused by mechanical factors; lesions of intervertebral discs, spondyloarthritis, osteoporosis, osteomalacia.