Nerve damage in both lower limbs refers to peripheral nerve damage, and its symptoms are mainly divided into the following aspects: 1. motor dysfunction. When the nerve damage is severe, there will be limb weakness and reduced motor ability, and in severe cases, patients cannot walk on their own, and after a long time, there will be muscle atrophy. 2, sensory impairment. Early sensory impairment is often obvious, and can be a numbness or numbness, sometimes with a burning sensation, ants walking sensation or obvious pins and needles sensation. 3, autonomic dysfunction. Patients may have distal skin dystrophy, skin thinning, edema, easy to flake.4. Some patients with more severe damage may also have deep sensory abnormalities, manifested as abnormal joint position sensation, abnormal two-point discrimination sensation, etc.