<unk>  is nonpassage of urine, in practice is defined as passage of less than 100 milliliters of urine in a day.<unk>  is often caused by failure in the function of kidneys. It may also occur because of some severe obstruction like kidney stones or tumours. It may occur with end stage kidney disease. It is a more extreme reduction than oliguria (hypouresis), with 100 mL/day being the conventional (albeit slightly arbitrary) cutoff point between the two.
Anuria
Crystalluria
Pyuria
Polyuria
Oliguria
Dysuria
Proteinuria
Nocturia