Transverse myelitis can occur throughout the spinal cord, usually in the upper thoracic spinal cord. Transverse myelitis refers to an autoimmune reaction caused by infection or other factors, resulting in pathological changes such as swelling, congestion, inflammation, and axonal degeneration of the spinal cord. It can occur in the entire spinal cord, such as the cervical, thoracic, lumbar, and sacral segments, and is more common in the upper thoracic spinal cord. If it occurs in the cervical segment, quadriplegia can occur, if it occurs in the thoracic segment, sensory and motor disorders below the level of the segments can occur, if it occurs in the lumbar segment, paralysis of both lower limbs can occur, and if it occurs in the sacral segment, perineal sensation and defecation abnormalities can occur. Most patients recover with aggressive care and hormonal and immunologic medications, but the prognosis may be poorer if multiple segments are involved or if the disease is prolonged. Transverse myelitis is recommended to go to the hospital for early treatment to avoid adverse consequences.