Stenosis is a medical condition characterized by the narrowing of a passage or opening in the body. This can occur in various areas, such as the spinal canal, blood vessels, or heart valves. The narrowing can lead to restricted blood flow or pressure on surrounding tissues, potentially causing pain or other symptoms. Common types of stenosis include spinal stenosis, which affects the spine, and aortic stenosis, which involves the narrowing of the aortic valve in the heart. Treatment options vary depending on the severity and location of the stenosis and may include medication, physical therapy, or surgical procedures.