There are many causes of lumbar pain, which are commonly caused by the following diseases: 1. acute lumbar sprain: the lumbar region is suddenly strained by external forces and caused by injury, mainly manifested as continuous pain in the lumbar region, and the pain is severe and intensifies after activity; 2. lumbar muscle strain: after prolonged standing, sitting or heavy physical labor, aseptic inflammation of the myofascia of the lumbar back, local edema, followed by lumbar pain; 3. lumbar intervertebral disc Herniated disc: due to nerve compression by the herniated part of the disc, manifesting as lumbar back distension, soreness, or even stabbing pain; 4. lumbar back myofasciitis: may be related to long-term chronic strain, usually manifesting as diffuse soreness and distension in the lumbar back, with extensive pressure pain in the lumbar region; 5. lumbar spinal stenosis: caused by congenital spinal canal hypoplasia or acquired factors, such as degeneration, trauma, inflammation, etc., resulting in lumbar spinal stenosis, usually manifesting as lumbar back pain, intermittent claudication, sciatica, cauda equina syndrome; 6. Urinary system diseases: kidney stones, ureteral stones, inflammation of the urinary tract, etc., can cause lumbar pain, often accompanied by corresponding symptoms of the urinary tract, such as urinary frequency, painful urination, hematuria, etc.; 7. Autoimmune diseases: aseptic inflammation caused by ankylosing spondylitis, rheumatoid arthritis, etc., can also cause local lumbar pain; 8. Other. Trauma, female menstruation, gynecological inflammation, lumbar spine inflammation, tuberculosis, tumors, etc. can also cause different degrees of low back pain.