Numbness of the right arm and fingers may be caused by physiological factors, acute injury, cervical spondylosis, cerebrovascular lesions and other factors. 1. Physiological factors: for example, the right side of the limb suffered a long time compression or keep a posture for a long time, will cause the right arm and finger numbness, should change the bad posture, lift the compression, reasonable activities, can be restored to normal. 2. Acute injury: for example, the right side of the limb suffered trauma, so that the nerves innervating the right arm and hand is seriously damaged, will cause the right arm and hand numbness, may also be accompanied by limb activity limitation, pain, swelling and other symptoms. 3. Cervical spondylosis: common in nerve root cervical spondylosis, cervical spondylosis is serious, serious compression of the nerves innervating the right upper limb, will cause numbness of the right arm and fingers, and the right limb radiating pain, neck and shoulder pain and other symptoms. 4. Cerebrovascular lesions: for example, acute cerebral hemorrhage or acute cerebral infarction, in the attack, it will lead to the right arm and finger numbness, accompanied by numbness of the right side of the lower limbs, speech impediment, nausea and vomiting, headache and other symptoms. If the right arm and fingers are numb and last for a long time, it is recommended to consult a doctor for a detailed examination and timely treatment after clarifying the cause of the disease.