Out-of-control blood sugar levels can lead to short-term problems like hypoglycemia, hyperglycemia, or diabetic ketoacidosis. In the long run, not controlling diabetes can damage important organs, like the heart, kidneys, eyes, and nerves. This means that heart disease and stroke, kidney disease, vision problems, and nerve problems can happen to people with diabetes.
These problems don’t usually show up in kids or teens who have had the disease for only a few years, but they can happen to adults with diabetes. Kids and teens with diabetes who don’t control their blood sugar levels can be late going into puberty and might not end up as tall as they would have otherwise.
The good news is that keeping blood sugar levels under control can help keep you healthy and prevent health problems from happening later.