Numbness in the arms and arms is generally caused by two conditions: first, central nervous system diseases are mostly seen in cerebrovascular diseases, cervical spondylosis, etc.. After a certain injury to a specific location in the brain may cause the corresponding neurological dysfunction, such as cerebral hemorrhage, cerebral infarction in cerebrovascular disease may cause numbness and weakness of the limbs, cervical spondylosis caused by spinal stenosis, nerve compression injury may also cause numbness and soreness in the arms and arms. Second, peripheral nerve disease is mostly seen in peripheral nerve inflammation, common diabetic peripheral neuropathy may appear arm arm numbness, mostly numbness in the forearm and the end of the hand and accompanied by shallow sensory loss. Some traumatic injuries causing bone damage to the arm may also pull on the peripheral nerve causing numbness and weakness in the forearm and hand and muscle atrophy.