An epidural nerve block is a common treatment for back pain due to spinal stenosis, herniated disc, or sciatica. Corticosteroid medication is injected into the epidural space of the spinal column. A local anesthetic is used to numb the site before a spinal needle is inserted. The procedure is done with the help of imaging to ensure precise administration of the medication.
The corticosteroid medication is injected along with anesthetic to help shrink swelling around nerve roots and relieve associated pain.
The effects of an epidural nerve block can last a long time and many individuals can go on to freedom from back pain. Usually three injections are indicated, scheduled two to three weeks apart, but if complete relief is obtained after one or two, further treatments may not be necessary.