The middle of the back is the location of the spine, the structure of this location has the thoracic vertebrae, the joint between the thoracic vertebrae and the thoracic vertebrae connected to the spinal ligaments, spinal cord, most of the pain in this location is caused by injury, may be a fracture of the thoracic vertebrae, misalignment of the joints between the thoracic vertebrae, may also be connected to the thoracic vertebrae ligament strain or strain. In the case of a fracture of the thoracic vertebrae, there is usually a definite injury and one is afraid to sit or stand, much less walk, and there is pain on pressure or severe pain when the fracture is struck with the fist. The pain caused by misalignment of the joints between the thoracic vertebrae will be significantly relieved by lying down and resting or by appropriate stretching activities. Most of the ligament injuries cannot contain the chest, lift the chest or get up and turn over, but they do not affect sitting, standing or walking.