The following two aspects are considered: 1, lumbar disc herniation, lumbar disc herniation compressing nerve roots, manifested as lumbar pain accompanied by calf radiated pain, numbness, weakness, walking impairment, as well as lower limb straight leg raise test positive, lumbar activity limitation, local skin sensory loss, lumbar spine magnetic resonance examination can clarify the disc herniation, as well as nerve compression. 2, lumbar pain and There is no direct correlation between low back pain and calf numbness. Low back pain is purely a muscle or soft tissue lesion, especially lumbar strain or third lumbar transverse process syndrome, which is manifested as low back pain with limited activity, and at this time, the concurrent calf neuropathy is manifested as localized calf numbness, commonly seen in common peroneal neuritis or ankle tunnel syndrome. Of course, this condition is relatively rare, and it is also necessary to perform magnetic resonance examination of the lumbar spine to exclude disc herniation, and to clarify the diagnosis based on the physical examination and the neuromyography of the lower limbs.