The causes of hand numbness in diabetic patients are mainly the following: 1. If the hand is numb bilaterally at the same time, consider and diabetic peripheral neuropathy has a very close relationship, because the characteristics of diabetic peripheral neuropathy, that is, bilateral limb sensation is basically the same, showing symmetrical abnormalities. 2. If the hand is numb unilaterally, generally consider and cervical spondylosis or other causes of nerve compression, usually more unilateral. Usually the nerve compression is more unilateral. If cerebrovascular lesions cause hand numbness, many patients will have a combination of ipsilateral lower limb changes, such as lower limb weakness or numbness. Therefore, the causes of diabetic hand numbness are mainly the above-mentioned aspects, to pay attention to the identification.