The causes of back pain may include thoracic spine tumor, thoracic spine compression fracture, thoracic disc herniation and so on. 1. Thoracic spine tumor: when there are tumors and other occupying lesions in the thoracic spine, it can be manifested as thoracic back pain; when the tumor is too large and compresses the spinal cord, it can cause sensory and motor disorder in the trunk and limbs; if malignant tumors metastasize, it can also cause the symptoms of the corresponding organs. 2. Compression fracture of thoracic vertebrae: when the back is hit by impact and other traumas, compression fracture of thoracic vertebrae can occur, accompanied by the damage of the surrounding soft tissues, in addition to the pain of the backbone, there can be local deformity, swelling, pressure and pain and other symptoms. 3. Thoracic disc herniation: when the thoracic disc is herniated due to degeneration, it can lead to back pain, and when the herniation is serious, there can be sensory and motor disorders and even urinary and fecal disorders. There may be other reasons for back pain, it is recommended to go to the hospital in time to improve the back CT, MRI examination, and give targeted treatment or treatment after a clear diagnosis.