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.

Sometimes the first sign of a problem is a change in the way you walk - a wider gait or slight foot dragging. The cause may be the slow loss of normal sensation in your feet, brought on by peripheral nerve damage. About 30% of these cases are linked to diabetes.

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.

Foot sores that will not heal are a major warning sign for diabetes. Diabetes can impair sensation in the feet, circulation, and normal wound healing, so even a blister can become a troublesome wound. Those sores also are prone to infection. Diabetics should wash and dry their feet and check them for any wounds every day. Slow-healing of sores also can be caused by poor circulation

Swollen feet - This is usually a temporary nuisance caused by standing too long or a long flight -- especially if you are pregnant. In contrast, feet that stay swollen can be a sign of a serious medical condition. The cause may be poor circulation, a problem with the lymphatic system, or a blood clot.

Raynaud’s disease can cause toes to turn white, then bluish, and then redden again and return to their natural tone. The cause is a sudden narrowing of the arteries, called vasospasms. Stress or changes in temperature can trigger vasospasms, which usually don’t lead to other health concerns. Raynaud’s may also be related to rheumatoid arthritis, Sjögren’s disease, or thyroid problems.