best diabetic clinics near me Diabetic neuropathy is a type of nerve damage that can occur in people with diabetes. It is a common complication of both type 1 and type 2 diabetes and is caused by high blood sugar levels damaging the nerves throughout the body. This condition most often affects the nerves in the legs and feet, but it can also impact other areas, including the digestive system, urinary tract, blood vessels, and heart.