There are many causes of back pain, including the following common causes: 1. Many respiratory diseases can cause pain in the back of the shoulder, usually in the back, side of the back and scapula, more common are pleural adhesions, lung cancer and tuberculosis. 2. Cardiovascular diseases can also cause pain in the back, common are angina pectoris and myocardial infarction. In addition, patients with biliary colic, pancreatic disease, stomach and duodenal tumors can also cause pain in the back of the shoulder. Bone, kidney, bladder, uterus, and lung, in the presence of malignant tumors that metastasize to the scapula, vertebral bones, and ribs, can cause vestigial pain. Cervical spondylosis, which is more staged, is also the most common cause of vest pain. In addition to vest pain, there can be stiffness and discomfort in the neck, numbness and weakness in the limbs, dizziness, and headache, and corresponding, fixed pressure points can appear. In addition, sprains and drop pillows of the neck, often due to improper neck activity or poor body position during sleep, resulting in sprained muscles, can cause pain in the back with pressure points that are fixed and located at the site of muscle damage. In addition, periarthritis of the shoulder joint, when painful, can also bring up undershirt pain. Myofibrillar tissue inflammation, when there are obvious triggers such as wind and cold, humidity, etc., can also cause pain in the vest, and massage or hot compresses are effective.