Diabetes is diagnosed by testing the blood for sugar levels. Blood is tested in the morning after you have fasted overnight.
Typically, the body keeps blood sugar levels between 70 and 100 milligrams per deciliter (mg/dL), even after fasting. If a blood sugar level after fasting is greater than 125 mg/dL, diabetes is diagnosed.
Your doctor will examine you to look for signs of diabetes complications. These include:
Laboratory tests are also used routinely to evaluate diabetes. These include:
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