In the clinic a normal human back bones, there are mainly 12 thoracic bones, 5 lumbar bones, and 2 scapulae and 12 ribs on the left side and 12 ribs on the right side. These bones can be connected together by muscles and ligaments, so that the human spine to make forward flexion, back extension, rotation and other movements. Because the human back, need to do weight-bearing activities frequently, and the range of activities is large, so it is easy to produce injury. For example, because the patient often do bending activities, will hurt the muscles of the lumbar region, appear lumbar muscle injury, the patient feels a knife cut-like pain in the lumbar region, and pressure pain is obvious, affecting the patient bending activities, you can do an ultrasound examination, or take an MRI film, can clarify the extent of the disease.