Enuresis occurs when children repeatedly urinate in other places than the toilet. The most common type of enuresis is bed-wetting, or nocturnal enuresis. Daytime wetting is called diurnal enuresis. Common causes include a small bladder, urinary tract infections, stress, developmental delays, and mental disorders. Children often outgrow enuresis, but if treatment is warranted, it may include bed-wetting alarms, medications, or other treatments. Follow the links below to find WebMD's comprehensive coverage about how enuresis is caused, what it looks like, how to treat it, and much more.