Bedwetting alarm: a starter guide for parents

How does the alarm work?

A sensor goes in the underwear or on the mattress. As soon as the first drops of urine reach it, the alarm makes a sound or vibrates. A vibrating type is available for children with hearing problems. Over time, the child learns to wake up to a full bladder. For the causes of bedwetting and other treatments, see bedwetting.

Who is it for?

Active treatment is usually recommended from age 6, but this is not a strict limit: some children are bothered by wetting at 5. The alarm works best when:

• the child wets often, almost every night;
• the child wants to be dry, and the family is ready to give support at night for a few months.

The alarm is less likely to work when wetting is infrequent, when the child shares a room with a sibling, or when the child has ADHD. If your child also has daytime symptoms, the daytime problems are assessed first.

The first nights

• Before you start, learn how to set up the alarm, how to check it and what to do if it does not work properly.
• Use the alarm every night, without breaks.
• A response takes a few weeks to develop. During this time your child may not wake to the alarm alone, and your own sleep may be disturbed for weeks or even months.

Your role as a parent

Wake your child as soon as the alarm sounds. Your child should be fully awake and walk to the toilet, then go back to bed and reset the alarm. Agree in advance with your child who does what.

Reward the agreed steps, not dry nights: waking to the alarm, going to the toilet, going back to bed and resetting the alarm. A dry night is not under your child’s control, but these steps are.

Keeping a diary

Each morning, write a short note: dry or wet night, whether your child woke to the alarm, roughly what time it went off, and whether the wet patch was large or small. At the follow-up visit, these notes help show the early signs of progress: smaller wet patches, waking to the alarm, the alarm going off later or less often, and fewer wet nights.

When to expect results

• The doctor gets in touch after the first 1–3 weeks to solve technical problems and support the family.
• Progress is assessed within 4 weeks. If there is no progress at all after 4–6 weeks, the alarm is stopped and another approach is chosen.
• If there is progress, the alarm is used until your child has had at least 14 dry nights in a row.
• At 3 months, the plan is reviewed again: the alarm is continued only if your child is still improving and the family wants to go on.

The alarm works in 50–70% of children, and a large share of them stay dry for good. When it does not work, a common reason is that it was not used correctly. In that case, desmopressin or a combination of both treatments is discussed.

If wetting comes back

If wetting starts again after successful treatment, you can restart the alarm right away. On the next attempt, the doctor may suggest a method called overlearning: once your child reaches 14 dry nights in a row, they drink 1–2 extra glasses of water every evening while still using the alarm. The evidence for this method is limited, and it is not used in children taking desmopressin, so it should only be done as part of the doctor’s plan.