The first thing that comes to mind is what is called peripheral neuropathy , or nerve disease. Damage to the nerves due to diabetes comes in two ways. One kind is damage to nerves that control involuntary processes, such as heart rate and digestion. This is called autonomic neuropathy. The other kind is damage to nerves in areas away from the central nervous system, such as the hands, arms, feet and legs.
Peripheral neuropathy is nerve damage to the extremities.
If you have Peripheral neuropathy, you may have pain, tingling, and numbness where the nerve damage is. Damage to the blood vessels in the legs and feet can lead to poor circulation. Poor circulation can make your feet feel cold and look blue and swollen. Exercise will not help cure peripheral neuropathy, but the effect of regular exercise will help maintain strength, flexibility, and circulation to the damaged areas. A combination of controlled blood glucose levels and exercise may help relieve the discomfort.