A fracture of the 12 thoracic vertebrae includes the following possible sequelae: 1. Chronic chest and back pain may occur. This is because the pain may occur even after the fracture is completely healed. Because this is called fracture disease, it can occur after the fracture.2. Nerve damage may occur. After the fracture of thoracic vertebra 12, it may cause the corresponding spinal cord segment damage, and once the spinal cord is damaged, it is very difficult to recover completely, and often there may be sensory and motor disorders in both lower limbs, as well as urinary and fecal disorders, and even sensory disorders on the corresponding skin surface.3, there may be spinal instability, or kyphotic deformity of the spine. After the vertebral fracture, often may be burst fracture or compression fracture, if the vertebral body is not restored to the original height, there may be a backward projection of the spine, or even spinal instability.4, may appear secondary spinal stenosis, that is, can not walk for a long time, may appear double lower limb sensory, motor disorder and intermittent claudication.