The numbness and weakness of the bottom of the foot, sometimes accompanied by calf cramps, can be clearly diagnosed with a positive tibial nerve percussion test and electromyography. 2. The nerves, especially the nerves that govern the sensation of the soles of the feet, often accompanied by weakness of the lower limbs, walking disorders and limpness, the site of protrusion and compression can be clarified by performing magnetic resonance examination of the lumbar spine. 3, pear-shaped muscle syndrome, mainly the sciatic nerve in the process of crossing the pear-shaped muscle is pulled, stuck, resulting in sciatic nerve compression, distal numbness, abnormal sensation and muscle weakness, pear-shaped muscle tension Positive test, electromyography of the lower limbs can clarify the diagnosis.