Causes of lumbago and lumbar leg pain are very many, mainly the following: 1, lumbar degenerative disease: lumbar disc herniation, lumbar spinal stenosis, degenerative arthritis of the lumbar spine or scoliosis in the elderly. 2, strain and trauma: lumbar muscle strain, interspinous and supraspinous ligamentitis. Spinal fractures, ligament injuries and other diseases. 3.Inflammatory diseases: such as tuberculosis, intervertebral discitis. 4, rheumatic disorders: rheumatism, rheumatoid arthritis, ankylosing spondylitis and so on. 5, metabolic diseases: osteoporosis and other diseases. 6, Tumor: primary or metastatic tumor of spine, intravertebral canal tumor. 7. Diseases of urinary system and reproductive organs: such as salpingitis, pelvic inflammation, etc., urinary stones, tuberculosis, pyelonephritis, etc.