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Why does urine volume reduce when holding it in at night? Can it cause kidney disease?

Hello sir I drink lots of water as i produce lots of sweat same as the urine discharged is also more. I have healthy weight and i don't feel any problem but when i drink lot of water at night before sleep i usually get up once or twice for urination at night sometimes i feel like getting up for urine, due to sleep i will avoid urination though the bladder is full after some time hour or two the quantity of urine produced is less let me know why the quantity of urine is reduced and do i get affected by any kidney diseases.
Asked On : Sun, 14 Apr 2013
Answers:  2 Views:  33
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Critical Care Specialist 's  Response
Hi thanks for your qoestion.
Holding urine in urinary bladder doesn't decreaseurinary volume much.Only a small amount of water is reabsorbed from bladder surface.However it does cause affect on the ureter and kidney.Due to back pressure on ureter ,it first cause dilatation of ureter and then finally pelvis of kidney leading to what is called as hydroureter and hydronephrosIs .Hydronephrotic kidney and ureter are more prone to infection.Urinary bladder also get dilated and become more prone to infection, a condition called as cystitis.
Hope this answers your question.
Answered: Sun, 14 Apr 2013
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General & Family Physician Dr. Nirmala P's  Response
Hi, thanks for asking in Healthcare Magic.

Drinking too much water or taking alcohol, coffee or tea will result in excessive urine production. Healthy young adults produce more urine in day time than during night. That is because, the anti diuretic hormone (ADH) which restricts the amount of water excretion is mainly produced during sleep. So, during deep sleep, due to the influence of ADH only moderate quantities of urine is produced. That is why you are passing low quantity, concentrated urine on the days you sleep soundly. It is quite normal and will not cause any kidney disease.

The urge to void urine is felt even when the bladder is half full. So when you are sleeping lightly you tend to urinate frequently. On the contrary when you sleep deeply you don't really feel the urge until the bladder is completely full.

But if you are urinating very often, then you should rule out Diabetes and Prostate enlargement, the two common causes of frequent urination.

Simple life style modifications like avoiding coffee, tea and alcohol before sleep and good sleeping habits will reduce night time awakenings.

I hope this is useful to you.
Answered: Sun, 14 Apr 2013
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