The pressure on nerves inside the narrowed spinal canal can cause pain in the legs when walking. Pain may improve when leaning forward and bent at the waist (ie: leaning over a shopping cart or cane).
In the illustration of cervical stenosis (below left), the narrowing is caused by bone spurs growing into the spinal canal. This puts pressure on the spinal nerves and the spinal canal.
In the illustration of lumbar stenosis (below right), the narrowing is caused by thickening of the spinal ligaments.
Causes and Risk Factors
This condition can develop because of: