A herniated lumbar 5-sacral 1 is, in most cases, a herniated disc in the 5th lumbar and 1st sacral vertebrae, which is not significantly related to the kidneys. Herniated discs in the lumbar spine are caused by a variety of reasons, the more common cause being degenerative changes in the lumbar discs. As we age, the lumbar spine activities increase and the body weight increases, the lumbar spine discs will undergo degenerative changes and the collagen content and water in the discs will decrease, which will make the discs less elastic and less stable, leading to the protrusion of the lumbar spine discs. Trauma can impair the stability of the lumbar spine and may also aggravate the herniated discs of the lumbar spine. After pregnancy, the weight-bearing of the body increases and the muscle strength of the lumbar region decreases, which also has an effect on the normal physiological curvature of the lumbar spine, a condition that also aggravates the protrusion of the lumbar disc. In addition, there are some abnormalities in the development of the lumbar spine itself, such as lumbar sacralization and sacral lumbarization, which can accelerate the protrusion of lumbar intervertebral discs.