The intervertebral disc usually consists of three parts, namely the cartilage plate, the fibrous ring and the nucleus pulposus. The nucleus pulposus is a flexible gelatinous substance that is encapsulated by the annulus fibrosus and the cartilage plate. The lumbar intervertebral disc is the most heavily loaded part of the body, and with age, or strenuous and/or excessive movement of the lumbar spine, it can cause degeneration of the nucleus pulposus and the fibrous ring, which eventually leads to fiber rupture and protrusion of the nucleus pulposus, irritating or compressing the nerve roots, resulting in a series of symptoms and signs, medically known as lumbar disc herniation. Because of the heavy load and activities in the lower back, herniation mostly occurs in the lumbar 4~lumbar 5 and lumbar 5~sacral l spaces.