The causes of back pain in the thoracic spine are many, the more common are trauma, infection, muscle strain, fasciitis and thoracic spine fracture and other thoracic spine diseases, accordingly go to the hospital to improve the examination, in order to clarify the cause of the disease. 1. Trauma: there is a history of trauma to the back and thoracic spine, which can lead to contusion and strain of the muscles, fascia and other soft tissues of the back, and part of it can lead to fracture of the thoracic vertebrae, which can cause pain in the back and thoracic vertebrae. 2. Infection: Bacterial infection of the soft tissues of the back, local redness, swelling, heat and pain, and may even lead to the formation of abscesses in the soft tissues of the back. 3. Muscle strain: Long-term engagement in strenuous exercise and heavy manual labor, back muscle tissue can be strain, so it can be manifested as back pain. 4. Fasciitis: the aseptic inflammation of the fascia of the back caused by trauma to the back, strain injury, cold and other factors, the fascia may appear edema, oozing and other changes, which in turn cause back pain. 5. Thoracic spine diseases: such as thoracic disc herniation, osteophytes and tumors, etc., patients may manifest pain in the back and thoracic spine. It is recommended that patients seek timely medical treatment and complete all auxiliary examinations in order to clarify the condition, and then give relevant treatments by professional physicians for the local causes of the disease.