Lower back pain with leg pain may be caused by improper activities, or lumbar spondylolisthesis, lumbar disc herniation and other diseases. 1. Inappropriate activities: If there are recent cases of frequent heavy lifting or excessive exercise, which lead to spasm of muscle fibers in the waist and legs, then it is easy to have lumbago and leg pain. 2. Lumbar spondylolisthesis: the etiology and pathogenesis of this disease are not yet completely clear, but there may be vertebral arch dysplasia, degenerative diseases, trauma and other causes related to the lumbar spine can also be secondary to lumbar spine tumors, metabolic bone disease and other diseases. Some patients may have lumbar pain with lower limb pain, numbness, intermittent claudication and other symptoms. 3. Lumbar intervertebral disc herniation: Research has shown that the occurrence of this disease is related to heredity, congenital lumbar spine developmental abnormality, pregnancy, chronic strain, intervertebral disc degeneration and other reasons. Typical symptoms are lumbar pain, sciatica, etc., which can be manifested as lumbar pain and leg pain. It is recommended that patients with lumbar pain and leg pain go to the hospital, complete the relevant examinations, and identify the specific causes.