Hand numbness if unilateral hand numbness, the first consideration is caused by cerebrovascular disease, generally ischemic cerebrovascular disease is common. The patient’s hand numbness can also be accompanied by other neurological deficits, such as hand weakness, as well as dizziness, headache, speech stupidity and other symptoms, can be given to the patient to check the head CT or MRI to confirm the diagnosis. Secondly, hand numbness can also be seen in cervical spondylosis, due to cervical disc protrusion leading to the dural sac and nerve root compression, the patient can appear hand numbness, when the condition is serious, it can also appear all day numbness, can also appear double upper limb numbness. Then hand numbness can also be seen in rare diseases, such as the relatively rare clinical spinal cord cavernous disease, due to spinal cord lesions can occur in both upper limbs of the numbness, accompanied by detached sensory deficits. In severe cases, patients can also be accompanied by dizziness, headache, for the hands all day numbness, it is recommended that the patient check the head CT, cervical spine CT, if necessary, check the head of the nuclear magnetic examination.