According to the degree of lumbar disc herniation, it can be divided into three stages: First, lumbar disc bulging, lumbar disc bulging is the most mild lumbar disc herniation, the degree of disc protrusion is the lightest, and the degree of compression for the dural sac spinal cord and nerve root is also the lightest, which triggers the lightest nerve damage symptoms. Second, lumbar disc herniation, lumbar disc herniation is a moderate degree of lumbar disc herniation, generally through strict conservative treatment to achieve better therapeutic effect, but there are very few conservative treatment effect is not good, the need for surgical treatment. Third, the most serious stage of lumbar disc herniation is the prolapse of the lumbar disc, free, when the lumbar disc from the gap completely fall into the spinal canal, the formation of prolapse free type.