Understanding Diabetes Diabetes is a metabolic disease that affects the health of millions of Americans - but many of them don't realize they have it. Types of Diabetes Diabetes is classified as type 1, type 2, gestational - a type of diabetes that occurs during pregnancy - and pre-diabetes. Complications of Diabetes Diabetes is a serious illness that carries the risk for a range of complications. Find out what you can do to help prevent those complications from developing. Managing Diabetes Whether you're newly diagnosed or someone who's been living with the condition for a while, find out what you can do to keep your diabetes under control. Diabetes and Children With obesity on the increase in children, type 2 diabetes and other health problems in youngsters are also on the rise. Diabetes and Pregnancy Sometimes changes in your body when you're pregnant cause your blood sugar to rise. This is called gestational diabetes.