The epidural steroid injection allows anti-inflammatory medicine (steroid) to be injected into the epidural space to treat pain caused by irritation of the spinal nerves. A protective covering called the dural sac surrounds the spinal cord. This sac contains spinal fluid that bathes and nourishes the spinal cord. The space between the outer surface of the dural sac and the bones of the spinal column is the epidural space. Nerves that go from the spinal cord through the spinal column and to … [Read more...] about Treating Pain with an Epidural Steroid Injection