Children practicing dance is the lower back movement may lead to paralysis, lower back movement is children practicing dance will often be used to practice movement: two legs stand apart and shoulder width, two pens upward, straighten the hip, the upper body back until the head is facing downward, the two palms of the hands to support the ground, the whole body is an arched bridge shape. In practicing the dance, when doing the downward movement, back pain and numbness suddenly appeared. At that time, she was able to walk after standing up, and within a few hours she developed paralysis of both lower limbs and sensory impairment below the chest. He had urinary and faecal problems. Abnormalities such as vertebral fracture or dislocation cannot be seen by X-ray and CT. By MRI, edema or hemorrhage of the spinal cord in the thoracic segment can be detected —- thoracic spinal cord injury. Three months later very poor MRI reveals that the spinal cord below the thoracic segment has atrophied, resulting in lifelong paralysis.