Bed-wetting, also called nocturnal enuresis, is more common than many parents think. It can be frustrating, but in most cases, it’s a normal part of growing up rather than a sign of something wrong.

Waking up to wet sheets is a nightly reality for many families. Roughly 1 in 5 five-year-olds and 1 in 10 seven-year-olds still experience bedwetting, making it one of childhood’s most common, if ...