Most doctors and patients believe that a herniated disc compresses the nerves and produces low back pain, and the larger the herniated disc, the more severe the low back pain. In the absence of CT and MR imaging, doctors and patients were convinced of this statement, and even more so after CT and MR imaging became available. Therefore, doctors and patients try to make the herniated discs disappear or shrink back through various treatments in order to eliminate the clinical symptoms of the patients. Before CT-guided drug intervention, we also followed this theory to guide our work. However, in nearly two decades of clinical practice, we have found that there is a discrepancy between the facts and the theory. Due to the advantages and special characteristics of our work as radiologists, we receive dozens of patients who come for lumbar spine CT or MR examination because of low back pain every day, and our research on the correlation between lumbar disc herniation and clinical symptoms of low back pain has found that: 1) patients with disc herniation and clinical symptoms of low back pain on preoperative CT or MR examination, and even though their clinical symptoms of low back pain disappeared, their clinical symptoms on postoperative imaging were not as clear as before. After surgery, although the clinical symptoms of low back and leg pain disappeared, the postoperative imaging was the same, and the herniated disc was still herniated and had not disappeared because of the surgery. 2, some patients are bulging in the imaging examination, although he did not see the herniated disc compressing the nerves, but can have the same clinical symptoms of low back and leg pain as the herniated disc. 3, we have carried out CT-guided drug intervention since 1993, and many patients with herniated discs that are considered by most doctors as having to be treated surgically (including severe herniation of the discs or accompanied by free discs) have had clinical low back and leg pain through the interventional therapy. After the interventional therapy, the clinical symptoms of low back and leg pain disappeared, but the intervertebral disc was still found to exist in the imaging examination. 4. Some patients’ CT and MR imaging examinations showed that the herniated discs did not match their clinical symptoms; for example, the discs were herniated on the left side, but the radiating pain of the lower extremities was on the right side; or some patients had herniated discs in the L5-S1 region, but their clinical symptoms were caused by the lesions of the L4-5 discs. Therefore, clinical practice tells us: 1. Patients with clinical symptoms of low back and leg pain can have disc herniation by imaging (CT, MR). 2! 2. Patients who have herniated discs on imaging (CT,MR) can be clinically free of low back pain symptoms! 3, Imaging examination (CT,MR) has a herniated disc. Patients with no clinical symptoms of low back and leg pain should not worry about the herniated disc and do not need any treatment!