Epidural steroid injections (ESIs) are a common treatment option for many forms of lower back pain and leg pain. The goals of an epidural steroid injection are to: * Control pain by reducing inflammation in and around the nerve roots * Improve mobility and function in the lower back and legs * Allow the patient to participate in and make progress with a comprehensive physical therapy and rehabilitation program Potential Benefits of Epidural Steroid Injections * Reduce nerve pain and inflammation