If the patient feels back pain, there are several factors as follows: 1, cardiogenic factors, usually in the heart blood supply insufficiency, such as coronary artery blood supply insufficiency heart disease, because the main branches of the coronary artery has three branches, usually is the left anterior descending branch, the left circumflex branch and the right coronary artery. When there is ischemia of the right coronary artery, such as ischemic spasm, ischemic stenosis, and insufficient blood supply, the symptoms and manifestations of cascading pains will appear at the reflex point, i.e., the back.2. In some lung diseases, such as chronic bronchodilatation, acute exacerbation of chronic bronchitis, or COPD combined with acute pulmonary insufficiency, the cascading pains will also occur in the back.3, In some herpes zoster, intercostal neuralgia, can also lead to the back with string pain obvious symptoms and manifestations.