How is diabetes in children diagnosed?

Carefully/quickly!! Ideally bood test - if sugar >100 in am, >140 2 hours after eating he has pre-diabetes. >126 am, >200 2 hours after eating = diabetes if use urine 'dipsticks over-the-counter- even 'trace' sugar = diabetes. Get patient to pediatrician soonest!
Hungery,thristy. Increased thirst and frequent urination. Extreme hunger. Weight loss. Fatigue. Irritability or unusual behavior. Blurred vision. Yeast infection in girls. Those the tests done after that to confirm it. Random blood sugar test. Glycated hemoglobin (a1c) test. Fasting blood sugar test. Autoantibodies that are common in type 1 diabetes. The presence of ketons in the urine.