Playing ball back pain may be acute lumbar muscle injury, chronic strain, lumbar disc herniation, lumbar spondylolisthesis and other related. 1. Acute lumbar muscle injury: playing ball may cause acute injury to the muscles of the lumbar back due to some strenuous improper movements, resulting in bleeding, oozing and edema at the injured muscles as well as inflammatory reaction in the later stage, which will cause lumbar pain, activity disorder and other manifestations. Lumbar MRI examination can assist in the diagnosis. 2. Chronic strain: if each playing sports load is small, but long-term playing can cause chronic strain of the lumbar muscles, at this time there will also be low back pain performance. This kind of back pain can be relieved after rest and braking or local physical therapy. 3. Lumbar intervertebral disc herniation: long-term ball games coupled with degenerative changes in the lumbar spine can cause disc herniation after a ball game, and then the herniation gradually aggravated and led to back pain symptoms. Lumbar spine CT and MRI examination can assist in the diagnosis. 4. Lumbar spondylolisthesis: when playing ball for a long time, the lumbar spine will be overloaded due to the movement of the lumbar spine, causing the lumbar spine supporting ligaments to gradually relax and the symptoms of lumbar spondylolisthesis pain will appear. Lumbar spine power position X-ray examination can assist in the diagnosis. There may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then follow the doctor’s instructions for treatment.