Paraplegia refers to the paralysis of both lower limbs. Acute paraplegia is a condition that starts with numbness or pain in both feet and develops into bilateral lower limb paralysis and urinary and fecal incontinence or retention after only a few days. The common causes of acute paraplegia are as follows: 1. Acute myelitis Acute onset, first feeling numbness or low back pain in both lower limbs, often within a few hours or days to complete paraplegia, urinary and fecal incontinence in mild cases, urinary and fecal retention in severe cases, and hyperalgesia in both lower limbs, the plane of hyperalgesia is mostly below the papilla. The cause of the disease is unclear, and there are often symptoms of viral infection such as upper respiratory tract infection, fever and diarrhea in the days or 1-2 weeks before the disease. If the disease is diagnosed early and given immunosuppressive therapy in a timely manner, there is often significant improvement, otherwise there will be serious disability. Acute epidural abscess is also an acute onset of paraplegia. Patients often have high fever and severe low back pain with significant pressure pain on one side of the spine, and there are often foci of septic infection in other parts of the body before the onset of the disease. The diagnosis is confirmed by local puncture at the site of the most pronounced paravertebral pressure pain if pus can be extracted. CT or MRI of the spine may also help in the diagnosis. Immediately after the diagnosis of the disease, effective antibiotics should be used to control the infection and drainage of the abscess, the symptoms can often be significantly improved. 3, spinal tuberculosis The sudden onset of paraplegia in patients with spinal tuberculosis is due to the destruction and collapse of the diseased vertebrae and compression of the spinal cord. Before the onset of paraplegia, the patient often has manifestations of tuberculosis such as low fever, weakness and wasting, and tuberculosis lesions can often be found in other parts of the body. Spinal X-rays may show destruction of the vertebral body and narrowing of the vertebral space. After diagnosis, in addition to immediate anti-TB treatment, surgical treatment should also be given. 4, spinal vascular disease Whether ischemic or hemorrhagic spinal vascular disease can be manifested as sudden severe back pain, rapid onset of severe paraplegia and urinary retention. Hemorrhagic lesions can be detected by lumbar puncture with bloody cerebrospinal fluid; ischemic lesions can be scanned by magnetic resonance imaging to detect spinal cord infarcts, and enhanced scanning can also detect spinal cord vascular malformations. 5, spinal cord trauma Trauma-induced paraplegia is called traumatic paraplegia. The key to diagnose this disease is a history of trauma. The diagnosis can be confirmed by CT or MRI scan. 6.Spinal cord multiple sclerosis This disease can also have an acute onset with paraplegia and urinary retention, which can be relieved after treatment, but there are often relapses. Magnetic resonance examination of the spinal cord can reveal two or more lesions in the form of strips or patches to confirm the diagnosis. If the disease is diagnosed early and treated promptly, most of them can be improved, but some disability is often left behind.