08/06/2023
Why do children wet the bed?
The main reasons why children wet the bed are:
They make too much urine at night. The brain produces a special chemical messenger, called vasopressin, during sleep. This tells the kidneys to make less urine. Some children are not able to produce enough vasopressin at night, so their kidneys carry on making as much urine at night as they do during the day. If the child sleeps through, then their bladder will empty, because it is not able to hold the large volume of urine produced.
Their bladder is not able to hold onto urine well enough overnight. If the child’s bladder is smaller than it should be, it will not be able to hold all the urine, even if the child is making enough vasopressin. If the child’s bladder wall gets twitchy during filling, it may empty some or all the urine at any time. Many, children with this problem also have some bladder issues in the day. They may have to run to the toilet (urgency), they may go to the toilet more often than others (frequency), or they may get damp or wet underwear during the day.
All children who wet the bed are unable to wake up when the bladder needs to empty. If they did not have the problem with waking, they would get up and go to the toilet
Other things that may cause bedwetting, or make it worse include:
1. Constipation. The full bowel puts pressure on the bladder, making it more difficult for the child to hold onto the urine made overnight
2. Drinking too much before they go to bed. If children drink large amounts before bed, they are more likely to fill their bladder before morning. If they are unable to wake up to the full bladder, their bed will get wet
3. Not drinking enough during the day. Not drinking enough during the day means that less urine is produced. If this happens regularly the bladder will get smaller, as it does not have to hold much urine. This may result in bedwetting
4. Drinking the wrong things. Fizzy drinks and ones that contain caffeine (tea, coffee, cola, chocolate and many energy drinks) can irritate the bladder lining and make wetting worse
5. Urinary tract infection. A urinary tract infection irritates the lining of the bladder, causing the bladder to empty more often. This can result in bedwetting.
6. Very rarely children wet the bed because of a different underlying medical cause. For this reason, if the child is unwell, or if bedwetting starts suddenly after a child or young person has been dry at night for some weeks or months, then they should see their GP.
7. Bedwetting can run in families. If a parent or close relative wet the bed, then it is more likely that the child or young person will also have bedwetting.
It is important to understand that children and young people do not wet the bed because they are lazy or being naughty. Punishment is likely to make the problem worse.
Taken from www.bbuk.org.uk