Diabetes Mellitus

Diabetes mellitus often simply referred to as diabetes-is a condition in which a person has high blood sugar, either because the body doesn't produce enough insulin, or because cells don't respond to the insulin that is produced. This high blood sugar produces the classical symptoms of polyuria (frequent urination), polydipsia (increased thirst) and polyphagia (increased hunger).
There are three main types of diabetes:
Type 1 diabetes: results from the body's failure to produce insulin, and presently requires the person to inject insulin.
Type 2 diabetes: results from insulin resistance, a condition in which cells fail to use insulin properly, sometimes combined with an absolute insulin deficiency.
Gestational diabetes: is when pregnant women, who have never had diabetes before, have a high blood glucose level during pregnancy. It may precede development of type 2 DM.