The numbness of the right arm may be caused by a long time fixed posture, or it may be the symptomatic manifestation of certain diseases, such as neurogenic cervical spondylosis, elbow-tube syndrome, etc., which should be consulted in time to find out the cause of the disease. 1, physiological factors: healthy people if the right arm for a long time to maintain a posture, blood vessels for a long time pressure, local ischemia and hypoxia, can lead to the symptoms of right arm numbness. 2、Pathological factors (1) Neurogenic cervical spondylosis: due to the degenerative changes of cervical intervertebral disc intervertebral joints, when the right side of the cervical nerve root is involved and there is compression or irritation, the patient may have the symptoms of radioactive numbness of the right upper limb, which is paroxysmal or persistent, usually accompanied by pain, and can be aggravated when coughing, sneezing and deep breathing. (2) Elbow canal syndrome: caused by the compression of the ulnar nerve in the elbow canal, numbness of the fingers and arms, numbness and discomfort, pain, etc., leading to the symptoms of right arm pain. In addition, stroke, multiple sclerosis, diabetic peripheral neuropathy, etc. can also appear in the right arm numbness symptoms, but this symptom alone is not enough to diagnose the disease, should be timely diagnosis, clarify the cause of the disease, and targeted treatment by the doctor. If it is not detected in time, there is a possibility of sudden onset of other dangerous diseases, which will seriously affect the patient’s life, health and quality of life.