Closed injection for lumbar disc herniation is one of the conservative treatment methods and is therefore effective. However, for some patients with serious conditions, especially those who have been sick for a long time, the effect is limited or even invalid due to heavy local compression. For patients with mild to moderate lumbar disc herniation, closure therapy can be performed when other conservative treatments are not effective. The principle of action is to inject lidocaine anesthetic drug and a small amount of hormone in the epidural wall to inhibit the excitability of nerve endings, improve local blood circulation, reduce local inflammatory response, and achieve the purpose of pain relief. If the treatment is relieved, it can be injected again 1-2 weeks later, generally limited to 3 times. And closed therapy has its indications, for most patients with herniated disc, the treatment is effective. Some of them, such as acute systemic infection, active tuberculosis, extreme physical weakness, skin or deep tissue inflammation at the closed site, are prohibited. Therefore, patients with lumbar disc herniation after appropriate conservative treatment, if there is no significant relief and no contraindication to the above, you can perform closure therapy. If the treatment is effective and relieved, 1-2 injections can be given again to consolidate the effect.