Alcohol and Bedwetting: Why night-time wetting can return after drinking

Many teenagers and young adults are surprised - and quite often a bit upset - when bedwetting that you thought had resolved, sometimes for years, suddenly reappears after drinking alcohol.

It can feel confusing and discouraging. Understandably, you may wonder whether the original bedwetting problem has returned or if something physically has gone wrong.

In most cases, neither is true.

Bedwetting after drinking alcohol is usually not a relapse. Instead, alcohol temporarily interferes with the body’s normal night-time continence system. The ability to stay dry is still there - but alcohol changes the conditions that allow that system to work reliably.

Understanding this can be enormously reassuring.

Why alcohol can trigger night-time wetting

Alcohol affects the body in several ways that increase the likelihood of bedwetting.

Firstly, it suppresses antidiuretic hormone (ADH), the hormone responsible for reducing urine production overnight. When ADH is lowered, the kidneys produce more urine, meaning the bladder fills more quickly during sleep.

At the same time, alcohol alters sleep depth. Although it often helps people fall asleep quickly, the early part of the night can become deeper and less responsive. For individuals with a history of bedwetting — who may already have a higher arousal threshold — this makes it harder for the brain to register bladder signals and wake in time.

Alcohol also relaxes muscles throughout the body, including those involved in urinary continence. When increased urine production, deeper sleep and reduced muscle tone combine, night-time wetting becomes more likely.

This does not represent failure or regression. It is simply a temporary shift in how the body manages sleep and bladder communication.

The emotional impact of bedwetting after alcohol

The emotional side of alcohol-related bedwetting is often overlooked.

Young adults may feel they had “grown out of” bedwetting and experience these episodes as a loss of progress. Anxiety about sleeping away from home, university life, relationships, or holidays can follow.

Anticipatory worry can then become part of the cycle. If someone begins to expect bedwetting after drinking, sleep can become either tense and fragmented or deeply exhausted — both of which can reduce the likelihood of waking to bladder signals.

Normalising the experience is therefore important. Bedwetting after drinking alcohol is more common than many realise, particularly in those with a childhood history of night-time wetting.

Practical ways to reduce alcohol-related bedwetting

Small adjustments are often enough to reduce episodes without needing to avoid alcohol altogether.

Timing tends to matter more than quantity. Drinking earlier in the evening and allowing a two-to-three-hour window between the last drink and sleep gives the body time to process fluids before deeper sleep begins.

A calm bedtime routine also helps. Emptying the bladder before bed — and then again shortly afterwards — can ensure it is fully empty rather than relying on a rushed final visit to the bathroom.

Hydration patterns are relevant too. Some people drink very little water during the evening and then consume large amounts before bed to counter dehydration. This late fluid intake can increase risk. More balanced hydration earlier in the evening is usually more helpful.

Sleep environment can also play a subtle role. Extremely warm rooms, heavy bedding, or falling asleep in a state of exhaustion can deepen sleep further after alcohol. A slightly lighter sleep environment can make it easier for the body to notice bladder sensations.

For some individuals, a temporary overnight alarm can provide reassurance while confidence rebuilds. Used gently and for a limited period, this is not regression but practical support.

Protecting confidence while the pattern settles

A key part of managing adult bedwetting triggers such as alcohol is protecting confidence.

Mattress protection, discreet absorbent underwear, or planning a quiet overnight bathroom visit when staying away from home are sensible, confidence-preserving strategies. They allow social life to continue without fear or embarrassment.

When anxiety reduces, the body’s responsiveness often improves naturally.

A reassuring perspective

Perhaps the most important message is that bedwetting after drinking alcohol does not mean progress has been undone.

The continence system is still working. Alcohol simply alters urine production, sleep depth and arousal for a few hours. With understanding and a few small adjustments, most young adults find the problem becomes far less frequent or disappears entirely.

Approaching the situation with calm acceptance rather than alarm helps both body and mind remain confident in the progress already made — which is often one of the most powerful factors in staying dry.

About the Author

Alicia Eaton is a Harley Street based Psychotherapist specialising in helping both adults and children with behaviour change and emotional wellbeing. She is also the author of five best-selling books including ‘Stop Bedwetting in 7 Days’ which is recommended by the NHS in the UK as well as doctors and hospitals all around the world.

She has also been voted the ‘Best Behaviour Change Therapist’ for 2026 by ‘Global Health & Pharma’ and was also a winner in their Mental Health Award categories in 2023 and 2024. For more details of appointments see here: CONSULTATIONS