Pain in the upper back may be related to the following causes: 1. trauma, such as the presence of spinal fractures, dislocations, or muscle or tendon strains, which can lead to significant pain here. 2. muscle spasm, which is often seen in patients who sit or stand for a long time with their heads down, or do a wide range of activities involving the back of the shoulder or neck, which leads to muscle fatigue here, which can also induce significant pain here. 3. 3, back fasciitis, this type of disease is often due to long-term cold, or the presence of some trauma, resulting in deep fascial parts of the aseptic inflammation, followed by pain here. 4, degenerative changes in the spine, the most common is cervical spondylosis, thoracic small joint misalignment. Once this type of disease occurs, it may lead to very obvious pain here, and may be accompanied by pain, numbness, weakness and a series of clinical manifestations in the shoulder and upper extremity.