Abridged from www.webmd.com
If your toes are always cold, one reason could be poor blood flow — a circulatory problem sometimes linked to smoking, high blood pressure, or heart disease. The nerve damage of uncontrolled diabetes can also make your feet feel cold. Other possible causes include hypothyroidism and anemia. A doctor can look for any underlying problems — or let you know that you simply have cold feet.
A burning sensation in the feet is common among diabetics with peripheral nerve damage. It can also be caused by a vitamin B deficiency, athlete’s foot, chronic kidney disease, poor circulation in the legs and feet (peripheral arterial disease), or hypothyroidism.