Spinal stenosis is a narrowing of the spaces within your spine, which can put pressure on the nerves that travel through the spine. This occurs most commonly in the neck and low back. Some people may not experience any symptoms, where as others may have pain, numbness, tingling and muscle weakness. Two common causes of spinal stenosis are osteoarthritis, and herniated or bulging discs. Other causes can be from tumors or spinal cord injuries. Spinal stenosis is often diagnosed through MRI and CT scan. In office nerve testing may help determine the health of the nerves affected by the stenosis. Treatment options may include medication, physical therapy and injection therapy, such as epidural steroid injection. If the stenosis is severe enough, or other treatment options fail, surgery may be indicated.