Right upper limb pain and numbness can be caused by physiological factors and pathologic factors, but the cause is caused by abnormal nerve conduction. 1. Physiological factors: such as the right upper limb for a long time to maintain a posture, or the right upper limb pressure, resulting in local nerve compression, local blood supply and oxygen supply is poor, resulting in nerve conduction obstruction, causing numbness. 2. Pathological factors: such as shoulder joint diseases, peripheral neurological diseases, neck diseases, craniocerebral diseases can cause nerve compression of the right upper limb, resulting in pain and numbness of the right upper limb. If you exclude the physiological factors leading to numbness of the right upper limb, you should go to the hospital in time for relevant examinations to clarify the cause and treatment.