My neighbor's daughter was diagnosed with type 1 at the age of 4. Managing her blood sugar levels with her varying activity and food intake levels was a nightmare.
They always carried these little glucose tablets to give her if her blood sugar levels took a sudden plunge, but those plunges were accompanied by irrational, combative behavior. On several occasions they literally had to wrestle her down, force them into her mouth and hold her mouth closed while she screamed and thrashed and fought.
As if that weren't bad enough, they also had to cope with the reactions of well-meaning bystanders, some of whom assumed they were abusing the child. Once, a gang of young men called 911 and threatened the girl's father with bodily harm if he didn't let her go. Fortunately, by that point she had absorbed enough sugar to abort the immediate crisis but he still had to explain himself to the cops and paramedics, showing them her medic alert bracelet, test kit and medications.