The difference between lumbar disc herniation and lumbar disc bulge, as follows: 1, lumbar disc bulge: belongs to the most mild type of lumbar disc herniation, bulge refers to uniformly bulging in all directions, the degree is light, but the range of bulge is often wide, bulge does not cause nerve root pressure and spinal cord pressure performance, at most is to cause symptoms of lumbar pain; 2, lumbar disc herniation: refers to The nucleus pulposus breaks through the fibrous ring and enters the spinal canal, which can protrude to the front and back, or to the side, or to the outside, resulting in different degrees of nerve root and spinal cord compression, which can cause radioactive pain in the lower limbs and numbness in the feet, and can also cause weakness in the lower limbs and unstable walking.