Spinal stenosis is the narrowing of one or more spaces within the spinal canal, which can put pressure on the spinal cord and nerves that travel through the spine. This narrowing can occur in any part of the spine, but it is most common in the lower back and neck. Spinal stenosis can cause pain, tingling, numbness, and muscle weakness, and symptoms can get worse over time. The most common cause of spinal stenosis is wear-and-tear changes in the spine related to arthritis. Other factors that can contribute to spinal stenosis include injury, other diseases, or inherited conditions. Some people with spinal stenosis have no symptoms, while others may experience pain, cramping, or weakness in the legs or arms. Treatment options for spinal stenosis include nonsurgical treatments such as physical therapy, medications, and spinal injections, as well as surgery in severe cases.