Frequent urination
Increased thirst
Dry mouth
Blurred vision
Fatigue
Headache
Increased hunger
Unexplained weight loss
Slow-healing cuts or sores
Frequent infections
Nausea
Fruity-smelling breath
Confusion
Blood sugar reading above your target range on a glucose meter
Blood sugar reading above 180 mg/dL after meals
Blood sugar reading above 130 mg/dL before meals
Blood sugar reading above 250 mg/dL with symptoms