What should you know about the bedwetting hormone?

A natural hormone signal normally tells the kidneys to make less urine while a person sleeps. If the night-time signal is still developing, the bladder may fill before morning. A child may also sleep deeply or have a bladder that sends less reliable waking signals. These mechanisms can overlap, so bedwetting is not explained by one hormone alone.

A return of wetting after dryness is different from a long-standing pattern. Constipation, a Urinary Tract Infection, Type 1 Diabetes or disrupted breathing during sleep can contribute and should not be assumed to be hormonal. Snoring or pauses in breathing may point toward Obstructive Sleep Apnoea.

Use regular daytime toilet visits and normal daytime hydration. Avoid deliberate dehydration or repeated night-time lifting. Toilet before sleep, make the route to the bathroom easy, and use washable mattress protection. Track wet nights alongside thirst, daytime frequency, bowel movements, snoring and medicines.

A clinician can decide whether an alarm, behavioural plan or a prescription medicine that mimics the night-time hormone signal is suitable. Medicines require exact instructions, especially about fluid intake, and should not be shared or adjusted without medical advice. See Bedwetting for general background.

Book a review when wetting is troubling, newly recurrent, accompanied by daytime leakage, or not improving with consistent routines. Seek prompt care for burning urine, fever, blood in urine, severe abdominal or back pain, unusual thirst, vomiting, weight loss or marked weakness. Arrange assessment for loud snoring, breathing pauses or poor daytime alertness.

Ask whether a urine test or constipation assessment is needed, whether an alarm or hormone-like medicine is appropriate, how fluid timing affects safety, and what to do after a wet night. Ask when treatment should be paused, reviewed or changed.