The drugs are delivered into the epidural space of the spine, which is the area between the bony vertebra and the protective dura sac surrounding the spinal nerves and cord. These injections can reduce inflammation and can be effective when delivered directly into the painful area. Unfortunately, the injection does not make a herniated disc smaller; it only works on the spinal nerves by flushing away the proteins that cause swelling. The pain relief can last from days to years, allowing your spinal condition to improve with physical therapy and an exercise program. The first step of the cervical injection treatment is applying a local anesthetic to the treatment area. This helps to relieve any discomfort that may occur during the injection process. Once the skin is numbed, a needle will be carefully inserted near the cervical nerves and the injection will be performed. This treatment is typically completed in less than an hour. After treatment, you may notice some minor swelling or bruising at the injection site, but these effects usually fade within a few days.