Diabetes mellitus is a combination of several diseases with various etiologies. Each one of these diseases have one thing in common, high blood glucose level thanks to insufficient secretion of insulin from the cells of the Langerhans islets in the pancreas. This high blood glucose results in the symptoms of polyuria (frequent urination), polydipsia (increased thirst) and polyphagia (increased hunger).
Type 2 Diabetes Mellitus
Type 2 Diabetes Mellitus is also known as noninsulin-dependent diabetes mellitus (NIDDM) or adult-onset diabetes. Type 2 diabetes is the most common type of diabetes. Type 2 diabetes is a long term serious disorder in which there is high level of sugar (glucose) in the blood. In this condition, your body either resists the effects of insulin or does not generate sufficient insulin to keep a normal glucose level. Some symptoms are: fatigue, hunger, increased thirst, increased urination, etc.