Pain in the middle of the back is also known as pain in the back of the spine, there may be the following causes: 1, tumors, when the thoracic vertebrae have tumors or metastases, can appear in the middle of the back pain, this should be early examination of the thoracic spine X-ray, CT, nuclear magnetic, to early diagnosis and early treatment; 2, osteoporosis, when the thoracic vertebrae have osteoporosis, can appear in the middle of the back pain, this should be early When there is osteoporosis in the thoracic spine, there can be pain in the middle of the back, which can be aggravated by pain in the morning, so early blood tests and X-rays and CT of the thoracic spine are needed for early diagnosis and treatment. This can lead to pain and limited movement of the spine. In this case, blood tests, sacroiliac joint and spine X-rays, and MRI are needed for early diagnosis and treatment.