Leg numbness may be caused by several reasons: first, diseases of the lumbar spine, such as lumbar disc herniation, lumbar spinal stenosis or nerve tumors in the lumbar region and compression of nerves, resulting in symptoms of leg numbness. Often there can be symptoms of numbness in the thighs, calves or sciatica, such as numbness from the buttocks all along the back of the thighs, radiating to the dorsum of the calves and the soles of the feet. Second, due to pear-shaped muscle syndrome, pear-shaped muscle syndrome can appear in the lower extremities of the sciatic nerve compression, resulting in leg numbness symptoms, this time to carry out the relevant physical examination and examination of neuromyography, to make a diagnosis. Thirdly, due to dermatomal neuritis, for example, the dermatomal nerve that governs a certain area of the leg is damaged or inflamed, which can also lead to symptoms of leg numbness.