Low back pain with lower limb radiation, consider the possibility of lumbar disc herniation. The manifestations of lumbar spinal stenosis are: 1. Central canal stenosis: soreness, numbness and weakness of the lower limbs appear after walking for a certain distance, which can be relieved after squatting and resting for a moment, and can continue walking again. 2, transcatheter stenosis: numbness and pain in the lower extremities appear after walking, which can be downward string pain, and can be relieved by squatting and resting. These two types of lumbar spinal stenosis symptoms are generally unaffected by cycling. In contrast, patients with lumbar disc herniation need to rest flat on their backs to get relief.