Left back rib pain may have the following causes: first, rib disease, when the ribs themselves have tumors, such as osteoid osteoma, osteoma or other tumors resulting in metastases, there can be pain in the ribs, then CT, ECT and X-ray examination of the ribs, for early diagnosis and treatment; second, intercostal neuralgia, intercostal neuralgia can appear on one side of the back This pain is often vague, stabbing or radiating. diagnosis and treatment.