Hyperglycemia - increased blood glucose (fasting above mg%). Occurs when diabetes mellitus, and diseases of the pituitary gland (a disease Itsenko - Kushinga), tumors of the crust and cerebral layer napochechnikov, with the defeat of diencephalic brain areas (tertiary syphilis), during pregnancy. Transient hyperglycemia possible with abundant carbohydrate diet (dietary or nutritional, hyperglycemia), the introduction of adrenaline or tireoidina. Therapeutic measures should be aimed at addressing the underlying disease.