There are many reasons for hand numbness and unconsciousness, the most common clinical causes of hand numbness and unconsciousness are as follows: 1. cervical radiculitis, cervical spine compression to the nerve roots may lead to hand numbness, mainly in one limb. 2. cerebral infarction, which can lead to hand numbness and unconsciousness, mainly in one limb, for example, in addition to hand numbness there will also be foot numbness, lower limb limb numbness. 3. if there is diabetes, blood sugar control is not good, or a longer history of diabetes, may lead to hand numbness and unconsciousness. If you have diabetes, poorly controlled blood sugar, or a long history of diabetes, it may lead to numbness and lack of sensation in the hands, commonly at the ends of the limbs, the hands of both hands and the ends of both feet will be numb and unconscious. Therefore, hand numbness and lack of sensation are clinically common for the above reasons, but no matter what, it is recommended to go to the hospital for a doctor’s evaluation to see what causes the hand numbness and treat it according to the cause.