The common causes of pain in the lumbar region include lumbar muscle strain, lumbar disc herniation, kidney stones and so on. 1. Lumbar muscle strain: if there is long-term labor or lumbar trauma and other factors will lead to lumbar muscle strain, causing aseptic inflammatory response, which may spread to the deep muscles, resulting in pain in the deep lumbar region. 2. Herniated lumbar intervertebral disc: long-term poor posture or degenerative diseases can lead to herniated lumbar intervertebral disc, and the protruding nucleus pulposus will compress the nerves or cause swelling of the surrounding tissues, resulting in pain in the lower back. 3. Kidney disease: kidneys are located on both sides of the spine, close to the back wall of the abdomen, when lesions occur, it will cause lower back pain, when a kidney stone occurs, the pain caused by the pain may be a vague pain, with the progress of the disease will develop into a dull pain, or even colic pain. There may also be other kidney lesions, you should go to the hospital to confirm the diagnosis, so as not to delay the condition. There may also be other causes of pain in the waist, it is recommended that patients should go to the hospital to clarify the cause of the pain, and take appropriate treatment measures under the diagnosis of the doctor.