What are the symptoms of type 2 diabetes if it is not managed?

The immediate symptoms of poorly managed type 2 diabetes are related to high blood sugar levels. The most common symptoms are fatigue, excessive urination, and constant thirst. Longer term, complications from uncontrolled diabetes include eye damage with loss of vision, painful and poorly function nerves and an increased risk of cardiovascular disease. In addition, excess sugar causes fatty liver disease, which can lead to liver failure and higher risk of liver cancer.