Diabetes mellitus

Diabetes mellitus is a disease characterized by persistent hyperglycemia (high blood sugar levels), resulting either from inadequate secretion of the insulin, an inadequate response of target cells to insulin, or a combination of these factors. Diabetes is a metabolic disease that requires medical diagnosis, treatment and lifestyle changes.

There are many causes and forms of diabetes known. The three most common patterns of diabetes have been recognized over the last thirty years as type 1, type 2 and gestational diabetes. There are some patients whose diabetes cannot be easily fit into one of these types, and some who display characteristics of more than one type at the same time.