1, the application of the dorsal scapular nerve anatomy and the causes of pressure: the dorsal scapular nerve is 5-8mm from the edge of the intervertebral foramen and emanates from the lateral C5 nerve root, its origin often merges with the long thoracic nerve, crosses the middle oblique muscle and sends small branches to the shoulder and axillary soft tissue. When the cervical nerve root, especially the C5 nerve root, is compressed, the dorsal scapular nerve is often involved. On the other hand, when the dorsal scapular nerve crosses the middle oblique muscle, some tendon fibers pass through the surface of the nerve, causing it to be compressed. 2.Diagnosis and differentiation: The position of the rhomboid and anterior serratus muscles innervated by the dorsal scapular nerve is deeper, and there are more muscles attached to the scapula, so it is difficult to measure the muscle weakness of one muscle alone, even it is difficult to detect electromyography with needle electrode. Therefore, in the diagnosis of scapulodorsal nerve entrapment sign, electromyography often has no obvious abnormal findings. The diagnosis is mainly based on clinical symptoms, signs and special tests. The disease is easily missed and misdiagnosed. In our group of 11 cases, except for 2 cases initially diagnosed, the remaining 9 cases were misdiagnosed as cervical spondylosis, trapezius strain and frozen shoulder. The key to differentiation is that the disease has two limited and fixed pressure points, especially when pressure on the paraspinal processes of the thoracic vertebrae 3 and 4 can induce soreness and discomfort in the ipsilateral upper limbs, and the symptoms can disappear completely or partially after the pressure points are closed, then the diagnosis of scapulodorsal nerve entrapment can be made. 3. Treatment and prognosis: Kevin et al. concluded that local closure is effective in the treatment of scapulodorsal nerve entrapment, and the closure point is the medial edge of the penetrating middle oblique muscle and the superior scapula where the scapulodorsal nerve is easily compressed, which is the midpoint of the posterior edge of the sternocleidomastoid muscle and the internal superior scapula where the clinical pressure pain is most obvious. In this group, after two courses of treatment with local closure of the two pressure points, 10 cases achieved significant results. Therefore, after the diagnosis of scapulodorsal nerve entrapment sign, local closure is the first choice of treatment. If the symptoms are severe and conservative treatment is ineffective, surgical treatment can be considered.