Diabetes is a group of chronic degenerative metabolic diseases characterized by high blood sugar (glucose) in the blood for long periods of time, that result in damages to the level of blood flow in small and large blood vessels. The most common symptoms are frequent urination, thirst and hungry. The terrible consequences most important long-term disease include cardiovascular conditions such as heart attacks, strokes, kidney failure, ulcers in the legs or feet may require amputation or eye damage to blindness.