What causes bedwetting? It’s about what happens in a child’s brain.

Many parents want to know the reasons their child wets the bed.

It’s simple: bedwetting almost always happens because a child’s brain has not learned to link needing to pee with waking and going to the loo.

Bedwetting stops when a child’s brain responds to the need to pee

Facts on bedwetting causes

  • Bedwetting is hereditary (runs in families): children are more likely to wet the bed if one or both parents have a history of bedwetting at the same age.
  • Bedwetting is uncommon:
    • more than half of children are dry at night by age 3 years 6 months
    • just 1 in 5 wet the bed at age 5
    • fewer than 1 in 50 wet the bed at age 15.
    • bedwetting is more common for boys than girls because girls' brains develop faster.
  • Bedwetting isn't usually caused by psychological trauma.
  • Bedwetting is more common for children with special needs, learning disabilities and developmental disorders like autism, ADHD and Down Syndrome, but wetting the bed does not mean the child has a disorder.
  • Bedwetting is more common in children who are deep sleepers, but deep sleep does not cause bedwetting.
  • Sometimes a child who was once dry at night starts to wet the bed again around emotional life events, like a sibling birth, house move or change of school. This is sometimes called 'regression'. Their brain is doing a lot of work and growing at these times!
  • Children do not wet the bed for attention, to annoy parents or because they're lazy.

Medical problems linked to bedwetting

In rare cases, a child will have a medical problem that needs treating before tackling the child's bedwetting. These include bladder infection (UTI), constipation and low Antidiuretic hormone (ADH) levels. If you think any of these may apply to your child, visit a doctor.

Read next: How to stop bedwetting with an alarm

Not ready for an alarm? Download our free Night Toilet Training Guide

"It's now 6 weeks since his first dry night. He is the happiest and proudest kid on earth. I'm still pinching myself that it worked."
- Debbie
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★ Reviews

Let customers speak for us

20 reviews
It’s been fantastic

Hello, I have a dri sleeper bedwetting alarm I have been using with my seven year old son for ten weeks now. It’s been fantastic as except for the first two weeks we haven’t had a single wet bed.

Well done - that is a terrific effort!
We have seen a massive improvement

Hi Karen,

We have been following all of the advice in your email for the past five weeks and we have seen a massive improvement. After the second week he was dry for six nights in a row, the following week the alarm went off four times (only once during the night) and his underpants were only wet a small amount. The following week the alarm only went off once and again only his underpants were wet. We are currently in a stretch of six nights dry and hoping for this to continue.

Thank you so much for your assistance, any advice is greatly appreciated.
Kind regards


That’s great news. Yes keep using the alarm until he has achieved 14 consecutive dry nights then he can stop using the alarm.
this alarm has already worked after about 2 - 3 weeks usage!

Hello Karen, I can confirm that this alarm has already worked after about 2 - 3 weeks usage! Can’t rate this highly enough and our 6 year old boy has basically gone from being wet every night (without fail) to now getting up on his own accord and going to the toilet in the night and being dry (pull up free!) in the morning! Even held wee in till the morning on a couple of occasions over last week! Incredibly effective product and will obviously be giving 5 stars on Amazon shortly (which says something as very rarely leave product reviews!)

Kind Regards

Sent from my iPhone

Congratulations Richard! Thanks for the feedback.
Cured!!!! Thank you.

Cured!!!! Thank you. I was dubious as to whether it would really work. It took a while to persuade our 5y/o to try it as she was VERY attached to the night nappies. The first 2 weeks were very hard. Up every night. But I could see some small progress in the second week as she began to wake up. Week 3 a lot better. Week 4 we started having dry nights. We’ve only had one bed wet since she was dry and that was at 9pm and we think due to a bad dream. Now she gets up to go to the toilet or waits till morning. So happy. It was well worth the perseverance and all the extra washing. No more nappies for us! She still won’t give up the alarm yet, but that’s no issue.

Perserverance is the key. Well done Deb!
He is the happiest and proudest kid on earth. I'm still pinching myself.

My 7 year old son has NEVER been dry in his life. Every night he was SATURATED and leaked through pull ups through the bedding.

It was his decision to order his alarm from your website as he was desperate to be dry and 'normal'. We ordered the DRI Sleeper excel.

From the first night he was dry he has NEVER had an accident since. He raced around the house with joy, saying 'my brain has woken up, my brain has woken up!!!!'.

It's now 6 weeks since his first dry night. He is the happiest and proudest kid on earth. I'm still pinching myself that it worked. In reflection I wish I'd gotten the wireless version but it still did a great job.

Words can't express how this has changed our sons life and ours. We have given away all his pull ups and we are all well slept. I can't thank you enough.

Thanks for sharing your story with us. This will be very encouraging for other parents.