Patients with arm numbness and discomfort should be integrated according to the situation to determine the cause of the phenomenon, the specific reasons are as follows: 1. Cervical spondylosis, frozen shoulder: the patient’s age of onset should be observed, such as patients in their 50s or 60s, there is obvious discomfort in the arms and shoulders, numbness, pain and other discomfort, can be considered caused by a herniated disc in the neck. At this time, in addition to the numbness felt in the arm, individual patients will also experience pain, local muscle atrophy or weakness. By doing neck imaging such as magnetic resonance, it can be obviously judged, and also by electromyography; 2, vascular atherosclerosis: it can also cause numbness and discomfort in the arm, especially if the patient has underlying diseases, such as hypertension and diabetes, which can lead to vascular sclerosis. Slow occlusion of small vessels after sclerosis causes nutritional metabolic disorders in the nerves of the arm, which can lead to numbness and discomfort in the arm; 3, other causes: trauma, infection, neuritis, carpal tunnel syndrome, elbow tunnel syndrome, etc., can lead to numbness and discomfort in different parts of the corresponding hand, arm or finger.