If a patient suddenly develops cold hands and feet, it is usually caused by the following factors: 1, caused by transient hypotension, when the body’s arterial blood pressure is insufficient, especially when the systolic blood pressure supply is insufficient, there will be a peripheral circulation disorder caused by low blood pressure, peripheral circulation disorder will appear sudden cold hands and feet. 2, fever and infection can also lead to sudden cold hands and feet, and then a high fever or sudden high fever will also Sudden cold hands and feet, accompanied by chest tightness, shortness of breath, coughing, etc. 3. Sudden cold hands and feet are also associated with a transient lack of blood supply to the body, and directly related to transient aortic insufficiency of blood supply. It is especially significant in acute myocardial ischemia and acute cerebrovascular insufficiency. 4. Sudden cold hands and feet are also associated with acute cerebral insufficiency and acute hypoglycemia, and sudden cold hands and feet can occur in sudden acute hypoglycemia.