The following are the causes of low back pain: 1. kidney disease, such as nephritis, kidney tumor or kidney nodes, will appear on one side of the upper back pain, then CT and ultrasound examination should be performed to further confirm the diagnosis. 2. ureteral stones, ureteral stones will appear in the lower back pain, usually the lower and middle part of the waist. 3. The pain can be accompanied by pain in the abdomen, and ultrasound should be performed to further confirm the diagnosis. 3, whether there is a muscle strain or soft tissue strain of the fascia, if the back pain occurs on one side after an exercise, it is usually caused by muscle strain. If the lumbar spine is abscessed as a result of tuberculosis of the lumbar spine, the lumbar pain on one side will also occur.