The causes of pain in the middle of the spine in the back are many, the more common ones are degenerative spinal lesions, spinal tumors, trauma, strain injury, aseptic inflammation, etc. It is necessary to improve the auxiliary examinations in order to clarify the cause of the disease. 1. Degenerative changes of the spine: for example, osteophytes of the thoracic spine, calcification of ligaments, herniated intervertebral discs, etc., which stimulate the nerves around the spine and cause pain. 2. Spinal tumors: including benign and malignant tumors, especially spinal metastatic tumors, the tumor can stimulate and compress the nerves, thus causing pain. 3. Trauma: there is a clear history of back trauma or strenuous exercise, which may cause vertebral fracture, dislocation, and strain of the surrounding ligaments, and thus cause pain. 4. Strain injury: most common in patients with long-term improper back posture or long-term heavy labor, resulting in chronic injury to the back muscles and fascia, and subsequent pain. 5. Aseptic inflammation: mostly caused by trauma to the ligaments and fascia of the spine, strain injury and exposure to cold. It is recommended that the patient go to the hospital, complete the auxiliary examination, clarify the condition, and then be treated by a professional physician for the specific condition.