Why do I have to take shots?
There is a type of chemical substance, called a hormone, that your body is supposed to make. It keeps the blood sugar levels from going too high. This hormone is insulin, and it normally would be made by your pancreas (PAN-cree-uhs). But if you have juvenile diabetes, your body has a problem making enough insulin, or may not be able to make it at all.
Because of this, you have to inject insulin into your body with a needle. This can be painful, and it can also be tiring and annoying to have to do. But without insulin, you would be very, very sick, or you might not even be alive.