Scapular girdle and upper extremity pain 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 various parts of the brachial plexus nerve, which consists of the anterior branches of the nerve from cervical 5 to thoracic 1, are damaged. What tests are needed for both scapular girdle and upper extremity pain? The following laboratory tests and neurological examinations should be performed according to their clinical manifestations: 1. Selective shoulder joint and cervical spine X-ray: one of the characteristics of X-rays is that the higher the voltage, the shorter the light wave of the X-rays produced and the stronger the penetration ability of the substance. 2, cerebrospinal fluid laboratory tests: this test is important in the differential diagnosis of certain diseases. When the total number of white blood cells is normal, generally no leukocyte classification is done. If it exceeds the normal value, it is necessary to do the leukocyte classification. The leukocytes in the cerebrospinal fluid are neutrophils, lymphocytes and endothelial cells (including monocytes). 3.Electromyography: the application of electrical instruments to record the electrical activity of muscles at rest or contraction, and the application of electrical stimulation to check the nerve and muscle excitation and conduction function. 4, upper limb hemogram: hemogram, generally refers to the bio-resistance resistance method, not ultrasound method, so also known as resistance map, or resistance vascular volume tracing. 5, nerve conduction velocity: a diagnostic technique used to assess the conduction function of peripheral nerves, usually including the determination of motor nerve conduction velocity and sensory nerve conduction velocity.