If a herniated disc is compressing a nerve, how can the following be explained: 1. Patients who have undergone CT or MRI examination within six months after disc herniation surgery have been found to have no change in the herniated area. 2, Why patients with bulging discs can also have the same symptoms of back and leg pain as patients with herniated discs. 3. Through our CT-guided drug treatment, the patient’s back and leg pain can disappear, but the herniation does not change on CT and MRI examination. 4, Some normal people do not have symptoms of low back and leg pain, but have herniated discs on CT and other imaging. It is easy to see through the four reasons we asked rhetorically that it is not the pain produced by the intervertebral disc compressing the sciatic nerve, so what is the cause of the patient’s low back and leg pain? According to our clinical experience in treating patients with lumbar herniation for more than a decade, the cause of lumbar pain in lumbar herniation is mainly aseptic inflammation, which is located in the nucleus pulposus of the intervertebral disc. When the protein (fibrous ring) ruptures, the yolk (various chemical substances of the nucleus pulposus) overflows and infiltrates the sciatic nerve behind the intervertebral disc, resulting in low back pain.