If the lower half of the body suddenly cannot move, most of them are caused by spinal cord lesions, such as acute myelitis, and if there is spinal cord vascular disease, it can also be caused, and if necessary, the diagnosis is clarified by spinal MRI plus angiography. Patients with myelitis may also have fever, back pain, and in severe cases, urinary and fecal dysfunction, which can be treated mainly with antibacterial drugs, cephalosporin antibiotics, and nerve-nourishing drugs. If the patient is considered to have spinal vasculopathy, the patient can also develop the above symptoms, including intra-spinal cord infarction or intra-spinal cord hemorrhage, and should be promptly hospitalized for comprehensive treatment after the onset. If the patient has a lumbar disc herniation, it can also cause, while the patient may have low back pain, also can appear lower limb numbness and other symptoms, lumbar spine nuclear magnetic examination can be clearly diagnosed, if necessary to the orthopedic department for consultation and treatment.