Back pain may be caused by lumbar muscle strain, lumbar disc herniation, lumbar vertebral osteophytes, urinary stones, kidney injury and other reasons. 1. Lumbar muscle strain: it may be caused by working hard for a long time sitting or standing for a long time using the muscles of the lower back, resulting in ligament injury; using the lower back for a long time to carry things, resulting in strain; or sitting and standing for a long time, etc. Most of the pain is caused by lumbar strain, and it can be relieved after resting, but it is easy to recur after exertion. 2. Lumbar intervertebral disc herniation: overwork and other reasons make the lumbar intervertebral disc degeneration, injury, lumbar spine development abnormality and so on. 3. Lumbar spondylolisthesis: it is mainly caused by spinal degeneration, back waist strain, back waist injury and other factors. 4. Urinary stones: caused by urinary tract infection, obstruction, foreign body or drug factors, such as dexamethasone, acetazolamide, amphotericin, etc., which cause stones and symptoms of posterior back pain. 5. Kidney injury: mainly due to the back injury caused by accidental bumping, falling and stumbling while working. If you have the above symptoms, please go to the hospital in time, and standardize the treatment under the guidance of the doctor.