Bed-wetting is involuntary urination during sleep in children. Typically, children become able to sleep through the night without wetting around ages 3 to 5 years.
Enuresis is bed-wetting at least twice a week. There are two types of enuresis:
- Primary nocturnal enuresis (PNE)—no periods of nighttime dryness
- Secondary nocturnal enuresis (SNE)—periods of nighttime dryness longer than 6 months followed by bed-wetting
Urinary System in Child
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Bed-wetting is common and not usually related to a medical condition.
Some factors that may contribute to bed-wetting include:
- Bladder control that develops more slowly than normal
- Greater than average urine production at night
- A tendency for deep sleep
- Overactive bladder
In rare cases, bed-wetting may be a symptom of a health condition. These conditions may cause excess urine or prevent the bladder from completely emptying. They include:
Last reviewedAugust 2014by Kari Kassir, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.