What could cause these symptoms in a child other than diabetes?

clammy skin
sweating
acting out
They go away after he has a snack or meal. The doctors have tested several times for diabetes but all the tests have come up negative.

What Could Cause Elevated Ketone Levels In The Bloodstream Other Than Diabetes?

Other than diabetes, what other conditions, factors, or causes could there be for having elevated levels of ketone in the bloodstream?

How Does Diabetes Damage The Blood Vessels In The Brain? Other Than Keeping The Diabetes Under Control, What?

can limit further damage?
Is it possible to reverse the damage?
My husband has type II diabetes and has had excellent A1Cs (less than 6 for the past 4 years), but we have no idea how long he had diabetes before it was diagnosed. We don’t know if the damage is recent or from before his [...]