Spinal Stenosis
As intervertebral discs degenerate and cartilage wears away, weight is transferred to the facet joints. To support the vertebrae, the body may grow new bone, which can narrow the space around the spinal cord and put pressure on the spinal nerve roots. Pressure on the nerves can cause spinal stenosis. Symptoms depend on the location of the stenosis: cervical spine (neck) or lumbar spine (lower back). Numbness, weakness, pain, and balance and mobility difficulties are common symptoms of both locations.
Arthritis 
