Who is affected by bed-wetting (nocturnal enuresis)

Bed-wetting is most common in younger children and is a normal part of developing bladder control until about age 5 or 6. The number of children who wet the bed decreases with age.

About 10% (7% boys, 3% girls) of 5-year-old children wet the bed.1 From age 5 on, about 15% of children who wet the bed become dry each year.2 By age 18 years, bed-wetting is extremely rare in females and is estimated to occur in about 1% of males.1


  1. Boris NW, Dalton R (2007). Enuresis (bed-wetting) section of Vegetative disorders. In RM Kliegman et al., eds., Nelson Textbook of Pediatrics, 18th ed., pp. 113–115. Philadelphia: Saunders Elsevier.
  2. Thiedke CC (2003). Nocturnal enuresis. American Family Physician, 67(7): 1499–1506.

Last Updated: November 12, 2008

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