Numbness of the hands and feet and black eyes may be caused by postural hypotension, hypoglycemia, cerebral arteriosclerosis and other reasons. 1. Postural low blood pressure: usually due to the lying position, squatting position or sitting position, suddenly get up, due to the speed of getting up too fast, it is likely to induce postural low blood pressure, resulting in insufficient blood perfusion to the brain, which may cause blackness in front of the eyes, and may be accompanied by numbness of the hands and feet, dizziness and other symptoms. 2. Hypoglycemia: When hypoglycemia strikes, the organs of the whole body can not get enough energy supply, causing insufficient blood supply and oxygen supply to the brain tissue, which may show numbness of the hands and feet, blackness in front of the eyes, and may be accompanied by panic, shaking hands and other symptoms. 3. Cerebral arteriosclerosis: because of cerebral arteriosclerosis leads to thickening of blood vessel wall, the lumen of blood vessel becomes narrow, resulting in a significant slowdown in blood flow, resulting in cerebral tissue ischemia, hypoxia, which may cause numbness of hands and feet, blackness in front of the eyes, and may be accompanied by symptoms of dizziness, headache and so on. Numbness of hands and feet, black eyes, may also be related to other factors. If the symptoms never get better, you should seek medical advice as soon as possible to diagnose the cause and then give targeted treatment.