Symptoms Many people older than age 50 have some narrowing of the spinal canal ( spinal stenosis) but do not experience symptoms. If the nerve roots or spinal cord become squeezed, symptoms may include: Numbness, weakness , cramping, or pain in the legs, feet, or buttocks. These symptoms get worse when you stretch or extend your back, such as when you walk, stand straight, or lean backwards. The pain gets better when you flex your spine forward, such as when you sit down or lean over a grocery cart. Stiffness in legs and thighs. Low back pain. In severe cases, loss of bladder and bowel control. Since the nerve roots that pass through the lower (lumbar) spine extend to the legs, spinal stenosis most commonly affects the legs. The classic symptom of lumbar spinal stenosis is leg pain when walking and standing that is relieved by sitting. Leg pain is often present when the spine is extended, as while standing straight or leaning backwards, and is relieved w...