Spinal stenosis is a condition that occurs as the spinal canal narrows, restricting or compressing the nerve roots and spinal cord. It is often caused by osteoarthritis of the spinal column. Common symptoms are pain in the legs or lower back when standing or walking.
The narrowing of the spinal canal often happens in the lower back (lumbar spine) and neck (cervical spine) or, on rare occasion, the thoracic region of the spine (upper back). The symptoms of pain, weakness, or numbness can occur in several areas, depending on the region of the spinal cord that is being pinched.