Numbness on the top of the foot may be caused by lumbar disc herniation compressing the nerves, generally accompanied by lumbar pain and radiating pain in the thighs, calves and other parts of the body, and the condition can be accurately determined by lumbar magnetic resonance examination. It may also be diabetic peripheral neuropathy, accompanied by a history of diabetes and other numbness in the endings of the toes, fingers, etc., which can be determined by blood glucose measurement, and other causes such as vascular lesions such as atherosclerosis, insufficient blood supply, ischemia, which can be determined by vascular ultrasound. Piriformis syndrome, peroneal nerve palsy, popliteal cysts and other masses compression of the nerve may also, can be through electromyography, popliteal ultrasound to help determine the mild numbness can be oral methylcobalamin nutritional nerve therapy, severe compression of the nerve if necessary, surgical decompression, help recovery.