An epidural injection is an injection of long lasting steroid and occasionally some other medications into the epidural space. The epidural space is the area that surrounds the spinal cord and the nerves coming out of it. The epidural space is just inside the spinal canal and extends from the neck to the base of the tailbone. The long acting steroid injected reduces the inflammation and swelling of spinal nerves and other surrounding tissues in the epidural space. This may in turn reduce pain, tingling and numbness and other symptoms caused by such inflammation, irritation or swelling.Epidural injections are most commonly performed for nerve root pain into the arms or legs caused by some irritating or inflammatory process such as a disc herniation.
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