Oliguria - reducing the number allocated by the kidney urine (in a day not more than 500 ml). Observed in diseases of the kidney (renal oliguria) and some physiological and pathological conditions, when the kidneys are not affected (extrarenally oliguria). Renal oliguria occurs in bilateral defeat parenhima kidney - acute and chronic nephrite (glomerulonephritis), chronic pyelonephritis. Extrarenally oliguria may develop in profuse sweating, vomiting, diarrhea, blood loss, severe cardiovascular disease. Treatment: addressing the cause oliguria the underlying disease. From oliguria should distinguish the urine, observed, for example, by tumors of the prostate.