Why do I have to check my blood sugar?
You have to check your blood sugar because that's how you find out what the level of sugar in your blood is. Testing your blood tells how well your last insulin shot worked and how much insulin you should take for your next shot.
Being able to test your blood sugar is a wonderful thing because it can help you keep your blood sugar at or close to the level where it should be. And that keeps your body working in tip-top shape.