Nocturia

Excessive urination at night.


The necessity to get up at night to urinate.


The fact of passing an unusually large quantity of urine during the night.


Excessive urination at night; it may be due to excessive fluid intake before bedtime, to renal disorder, or, in older men, to prostatic disease (compare enuresis); also called nycturia.


The need to urinate during the night. Nocturia is common in older people and pregnant women. The condition may also be a symptom of other diseases, such as an enlarged prostate, infection of the bladder, kidney failure, uncontrolled diabetes, or congestive heart failure.


The passage of urine at night. In the absence of a high fluid intake, sleep is not normally interrupted by the need to pass urine. Nocturia usually occurs in elderly men with enlarged prostate glands, and is a common reason for patients requesting prostatectomy.


Excess passing of urine during the night. Among its many causes are glomerulonephritis and enlargement of the prostate gland.


Excessive or frequent urination after going to bed, typically caused by excessive fluid intake, congestive heart failure, uncontrolled diabetes mellitus, urinary tract infections, diseases of the prostate, impaired renal function, or the use of diuretics. Less often, diabetes insipidus is the cause.


The disruption of nighttime sleep due to the necessity of urinating is referred to as nocturia. Generally, a somewhat filled bladder doesn’t typically interfere with sleep for most individuals, although those who are sensitive sleepers are more prone to waking up with the urge to empty their bladders. Consumption of alcohol in the evening can enhance urine production and potentially lead to instances of nocturia.


A common cause of nocturia in men is enlargement of the prostate gland, which obstructs the normal outflow of urine and causes the bladder to empty incompletely. In women, a common cause is cystitis (inflammation of the bladder), in which irritation of the bladder wall increases its sensitivity so that smaller volumes of urine trigger a desire to urinate. A common cause of nocturia in both sexes is heart failure (reduced pumping efficiency of the heart), leading to the retention of excess fluid in the legs during the day, which is absorbed into the bloodstream while lying down at night and is carried to the kidneys to make more urine.


Not as frequently observed triggers of nocturia encompass diabetes mellitus, which leads to an increased production of urine throughout both daytime and nighttime; chronic kidney failure, causing a loss of the kidney’s usual capacity to generate a smaller yet more concentrated amount of urine during the night; and diabetes insipidus, where the kidneys are unable to concentrate urine due to the absence of a pituitary hormone.


Nocturnal enuresis, also called nycturia or bed-wetting.


 


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