Lumbar disc herniation is a common clinical condition, and I often encounter patients in the clinic who come to me to ask if I have a herniated disc. Now I am going to do some popularization on this. Lumbar disc herniation is a disease caused by the nucleus pulposus protruding from the nerve roots after the rupture of the fibrous ring, with lumbar and leg pain as the main manifestation. 1, the development process of lumbar disc herniation can be divided into: the middle blue is the nucleus pulposus of the disc, the peripheral pink is the fibrous ring, the cross-section of the disc protrusion, nerve root compression causes lower limb radiating pain. The distribution of pain in the lower extremity when the corresponding nerve root is compressed. Squeezing the nerve root can also cause radiating pain in the lower extremity due to the narrowing of the lateral saphenous fossa caused by the posterior synovial joint hyperplasia. However, if MR examination is done in normal population, it will be found that a large number of herniated discs exist, but they do not have the manifestation of low back and leg pain, which is because the herniated discs do not compress the nerve tissue causing the corresponding symptoms. This is because the protruding disc does not press on the nerve tissue causing the corresponding symptoms. Its can only be called a lumbar disc herniation, but cannot be a lumbar disc herniation and is not required to be treated. Only those patients who have pain and other uncomfortable symptoms need to be treated accordingly. 2, lumbar disc herniation to do relocation guide in the end is good? Traction can produce a certain negative pressure in the disc and retract part of the disc, but it does not solve the fundamental problem. The pain will be relieved when traction is applied, but it will recur as soon as it is applied.