The most common causes of arm neuralgia are as follows: a. Cervical spondylosis, mostly due to cervical spine osteophytes, herniated discs, hypertrophy of the ligamentum flavum, calcification of the collateral ligament, as well as muscle inflammation, adhesions, spasm, contracture, etc., which irritate and compress the nerve roots, so there is pain and numbness in the neck, shoulder and arm. This pain is often indefinite, radiating to the back of the scapula, near the shoulder well point, as well as to the anterior, lateral, and posterior sides of the deltoid muscle in the shoulder, radiating along the upper arm to the forearm, and even radiating to the fingertips. In the case of cervical 5-6 compression of the cervical 6 nerve, it radiates to the thumb, cervical 6-7 compression of the cervical 7 nerve radiates to the middle and index fingers, and compression of the cervical 8 nerve radiates to the ring and little fingers. Second, the dorsal radial nerve of the forearm at the lateral epicondyle of the humerus and the joint common tendon of the forearm extensor will also cause neuralgia in the arm.