Caudal injections are a type of epidural injection(epidural space surrounds the spinal cord and nerve roots) administered to low back. The injection contains a steroid that reduces pain and inflammation. Caudal injections are performed as outpatient procedures so that patients can go home the same day. Most patients experience pain relief within a few days(peak effect can be seen within 8 days) . Causes of nerve pain and inflammation may include: 1)Spinal canal stenosis. 2)Failed back syndrome or postlaminectomy syndrome. 3)Herniated disks. 4)Degenerative disk disease. 5)Sciatica or Radiculopathy