In many cases of type 2 diabetes, there are no symptoms until a person experiences complications relating to the condition. This means people can potentially live several years with diabetes and not even be aware or suspect that they have the disease. Type 1 diabetes symptoms can include excessive urination, thirst, weight loss, vision changes, constant hunger, and fatigue. Those who suffer from type 2 diabetes may experience similar symptoms, but to a far lesser degree if there are no complications.