Pain in the scapular girdle and upper extremities is one of the main symptoms of primary brachial plexus neuralgia, or brachial plexus neuritis. Brachial plexus neuralgia is a condition that produces pain within its innervation when the various parts of the brachial plexus nerve, which consists of the anterior branches of the nerves from cervical 5 to thoracic 1, are damaged. Brachial plexus neuralgia can be divided into primary and secondary two categories, the latter is more common. 1, idiopathic brachial plexus neuralgia or brachial plexus neuritis: generalized scapular girdle and upper extremity pain myalgia and myasthenia gravis syndrome (neuralgia myasthenia gravis), symptomatic recurrent autosomal dominant inheritance (chromosome 17, locus q25) adults are common, there is a history of infections and vaccination acute or subacute onset of the disease, the disease is accompanied by fever and systemic symptoms typical of the shoulder & upper extremity severe pain, the disease appears in the last few days of upper extremity muscle weakness reflex changes, sensory impairment and pain. The upper limb muscle weakness reflex changes, sensory deficits C5 and C6 segments are easy to be involved leading to myasthenia gravis, unilateral can also be bilateral. 2, secondary brachial plexus neuralgia: shoulder and upper limb different degrees of pain persistent or paroxysmal exacerbation of pain at night and limb activity pain is obvious arm, plexus distribution area sensory impairment myasthenia tendon reflexes decreased autonomic nerve disorders, if cervical spondylosis caused by the disease is often in the age of 40 ~ 50 years old, men are more common; the disease course is slow, recurrent; sensory nerve root (C5C6 common) compression leads to radicular neuralgia, for the forearm radial and Finger electric shock-like pain, accompanied by hyperalgesia; motor nerve root compression causes myalgia pain often in the proximal shoulder scapular region of the upper extremity, persistent dull pain and deep drilling discomfort shoulder movement limitation, the disease can lead to long condensation of the shoulder. According to its lesions can be divided into radicular brachial plexiform neuralgia and dry brachial plexiform neuralgia. The causes of radicular brachial plexus neuralgia include cervical spine lesions, cervical medullary tumor, epidural metastatic cancer and so on. The causes of dry brachial plexiform neuralgia include cervicothoracic outlet area syndrome, brachial plexus neuritis, cervical tumors, trauma, tuberculosis, apical lung tumors and so on.