Diabetes is an increasingly common disease in which the blood sugar becomes higher than normal. Most diabetics are type 2 where there may be no symptoms at all for many years. When blood sugars become severly elevated, symptoms that appear include large volumes of urine, intense thirst resulting in drinking large quantities of fluids, fatigue, and, sometimes, blurriness around lights at night. Type 2 diabetes can often be controlled initially without medication just by diet, exercise, and weight loss. There are many effective oral medications. All type 1 and many type 2 diabetes will require insulin. Tight control of the blood sugars reduces the risk of complications.