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> What is the purpose of an Epidural Steroid Injection? The Epidural Steroid Injection is a procedure where an anti-inflammatory medication (steroid) is 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 pass through the epidural space on the way to the body. Several conditions can cause irritation of these nerves including herniated disks, spinal stenosis (narrowing of the spinal canal), and bony growths . Depending on the location of your pain, the epidural steroid injection may be given in the neck (cervical), middle back (thoracic), or the lower back (lumbar or sacral).
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