Numbness in the arm joints may be caused by cervical spondylosis; it may also be caused by elbow canal syndrome. 1. Cervical spondylosis: the cervical spine due to age, repeated strain injury and other reasons may appear cervical spine degenerative lesions, cervical spine degenerative lesions is the basis of the onset of cervical spondylosis, cervical spondylosis can lead to cervical intervertebral disc dehydration lesions, resulting in cervical intervertebral disc dislocation, the posterior as well as lateral posterior nerve block may be jammed symptoms, resulting in pain in the arm joints and hand numbness of the symptom. 2. Elbow tube syndrome: the elbow joint has a bony tube formed between the medial epicondyle of the humerus and the hawksbill of the ulna, which is called the elbow tube, and inside the elbow tube, there is the ulnar nerve as well as the ulnar artery and vein running through the elbow tube. Traumatic arthritis, tendon sheath cysts and other factors cause neurovascular compression in the elbow canal area caused by the symptoms can be called elbow canal syndrome, elbow canal syndrome may also appear arm joint pain hand numbness symptoms. Arm joint pain and numbness may also have many reasons, arm joint pain and numbness symptoms alone sometimes can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended that the cause of the disease under the guidance of a doctor and targeted treatment.