How can diabetes cause impaired blood circulation?

Poor circulation: High glucose in the blood can cause damage to the arteries. Diabetes with high cholesterol and hypertension lead to higher incidents of heart attacks and strokes. Many diabetics have peripheral artery disease and get cramps in the calves. They heal poorly when there is an injury to the feet. The best thing to do is to have tight control of your blood sugar, see dr., quit smoking, exercise, diet.