Low back pain may be a kidney problem. Among the diseases that cause low back pain, nephritis and urinary stones, including kidney stones and ureteral stones, can cause symptoms of low back pain, and the degree of low back pain is relatively heavy. Of course, the diseases that cause low back pain are not all kidney problems, but in the vast majority of cases are spinal pathologies and muscle and ligament pathologies, including lumbar disc herniation, lumbar spinal stenosis, lumbar spondylolisthesis, lumbar muscle strain, and ligamentitis. However, a small percentage of causes are due to kidney pathology, so it is important to differentiate in detail in clinical practice.