The root cause of lumbar spine protrusion is degenerative lesions of the lumbar spine, and external adverse factors can also promote the occurrence of lumbar disc protrusion, mainly including the following aspects: 1. congenital lumbar spine dysplasia leads to uneven force on the intervertebral disc, which is prone to lumbar disc protrusion. 2. long-term bending work or strenuous activity of the low back leads to lumbar back muscle strain, lumbar back muscle strength is weakened, and the stability of the lumbar spine is poor, which is prone to lumbar disc protrusion. 3. The lumbar disc protrusion can occur due to the damage to the lumbar spine caused by fall injury or acute lumbar sprain. 4. middle-aged and elderly patients can also be induced to have a lumbar disc protrusion due to the decrease in bone mass and osteoporosis or osteophytes caused by calcium deficiency. There is some variability in the patient-specific onset triggers, some of which are due to a combination of effects.