The causes of pain in the posterior dorsal sulcus consider soft tissue injury, fasciitis, thoracic disc herniation, thoracic spine tumor, thoracic spine fracture. 1. Soft tissue injury: excessive exercise or trauma can lead to local skin injury and muscle strain in the dorsal sulcus, causing local soft tissue edema, oozing, inflammatory factor aggregation and pain. 2. Fasciitis: poor posture, repeated soft tissue injury, catching cold, etc. can cause local aseptic fasciitis, or infection caused by bacteria or tuberculosis bacillus, which can lead to local inflammatory factor aggregation, or even septicemia, vertebral destruction, etc., and all of them can cause local pain with redness, swelling and elevated skin temperature. 3. Thoracic intervertebral disc herniation: Thoracic intervertebral disc herniation causes intervertebral disc herniation to compress the local nerve root, resulting in pain in the dorsal groove, accompanied by throbbing pain in the lower limbs. 4. Thoracic spine tumor: Thoracic spine tumor not only destroys the vertebral body, but also squeezes the local soft tissues due to the increase of tumor size, causing pressure increase and local pain. Thoracic vertebral fracture causes edema of bone trabeculae, and the fracture broken end stimulates the local soft tissue, resulting in edema and pain. Causes of back communication also include thoracic spine fracture and pleural and thoracic spine tuberculosis, etc. Back groove pain is recommended to actively seek medical attention and treatment under the guidance of physicians.