Hi Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concern... Cold sensations in body, feet and hands of a diabetic are mostly caused due to diabetic neuropathy. It is a long term complication of diabetes. Long term high blood sugar levels damage nerves in your extremities. These damaged nerves cannot effectively carry messages between the brain and other parts of the body. You may not feel heat, cold, or pain in your feet, legs, or hands. In some cases a person feels coldness or tingling of feet. Often this problem occurs more at night. You may feel even tingling sensation or numbness in feet & hands. Therefore it is important to inspect your feet daily. If a shoe doesn t fit properly, you could even develop a foot ulcer and not know it. An ulcer can also be infected because of high blood sugar and can even lead to amputation. There are treatments that can help slow the progression of this condition and limit the damage. Refer to a endocrinologist or a diabetes specialist hope this information helps