Oliguria denotes an abnormally low urine output of the body, defined by diuresis, namely urine volume output over 24 hours, inferior to 500 ml in adults. Oliguria can be temporary or evolve into an anuria
, which is where the kidneys stop producing urine. Oliguria problems usually signify kidney malfunction, notably in cases of kidney failure. Nevertheless, the non-passage of urine is not necessarily linked to an interruption in urine production, and oliguria is observed in cases of obstruction in the urinary tract
due to gallstones or pressure. Treatment options for oliguria depend on the underlying cause.