There are many causes of low back pain, mainly the following: 1, violent bending, lifting heavy objects or twisting the waist, resulting in muscle strain in the lumbar region, this condition usually when bending and lifting heavy objects, the pain is obviously strengthened, and the symptoms can be significantly improved when resting in bed. 2, due to long-term maintenance of a posture, such as sedentary, standing, squatting, resulting in the muscles of the lumbar region continue to be fatigued. The painful sensation is caused by the inflammation in these inflammatory exudates, which will stimulate the peripheral nerves and cause pain. 3. lumbar disc herniation, degeneration of the lumbar spine and intervertebral disc, when the vertebral body extrusion leads to the rupture of the fibrous ring and the nucleus pulposus is squeezed out, it will produce obvious pain, and some will compress the nerve roots and cause numbness or pain in the lower limbs. Complications. 4, urinary stones, such as ureteral stones, stones in the process of going down the ureter, stimulating the ureter, there will be severe pain, this pain is generally very intolerable. These are a few common causes of back pain.