Do you have such an experience in the cold spring? Walking for a long time, calf pain, numbness or leg “cramps”, numb toes, need to stop to rest for a while to continue? When you sleep, you always feel that your feet or hands are not warm and cold? Do your fingers and toes feel black and ulcerated? If you have the above symptoms, you should pay attention! If the blood vessels in the extremities of diabetic patients are not smooth, it will lead to insufficient blood supply to the extremities and ischemic lesions in the hands and feet. For example, the hands and feet are cold and afraid of cold; walking legs “cramp” feet numbness; feet white, no blood. In severe cases, numbness and pain in the toes and feet at night, and even blackening and ulceration of the fingers and toes, which can be life-threatening in severe cases. Therefore, diabetic patients should pay attention to the health care of hands and feet in daily life, pay attention to the presence of the above-mentioned manifestations, and if it is not yet clear, or the situation of vascular occlusion of the limbs has not yet been related to the examination, should seize the time to go to the hospital to assess the vascular situation.