<unk>  is the low output of urine below 300-500ml/day.  The decreased output of urine may be<unk>  by dehydration, renal failure, hypovolemic shock, hyperosmolar nonketotic coma, urinary retention, DKA, preeclampsia, and urinary tract infections among other conditions.
Oliguria causes
Dysuria causes
Diabetes insipidus causes
Polydipsia causes
Pyelonephritis causes
Acute tubular necrosis causes
Chronic renal failure causes
Hypotension causes