Without enough insulin, glucose stays in the blood and can't get into cells for energy. This high blood sugar makes people feel tired. They also urinate a lot, because the body tries to get rid of extra sugar through the kidneys. Then, they have to drink a lot to make up for going to the bathroom a lot.
There is no cure for diabetes. Kids watch what they eat, exercise regularly, and check their blood sugar often. Some have to take insulin shots; others take pills to help insulin work.