Any sure signs of diabetes in 20 yr olds?(noticed larger appetite in the past yr,with a random & intense craving for sugar esp. after meals.sometimes sweets do not satisfy then i find what i really wanted=water.i take 3-4 glasses/day,that may be it?

There are 2 basic forms of DM. One most common in 8-10 yo kids comes on quickly with increased feeding/drinking/rapid weight loss. The second is more common among overweight adults who may show no symptoms for years. Either form will spill sugar into their urine and have abnormal blood sugar tests. Appetites & cravings are non-specific symptoms.

Get fasting blood glucose level done at an accredited lab. not glucometer testing. Fasting for at least 8 hours before blood draw. If fasting blood glucose is higher than 126 mg/dL, on two occasions, that would be diagnostic of diabetes. If any random blood glucose higher than 200 mg/dL is also diagnostic of diabetes. Talk to your doctor to get tested.