Bed-wetting, or involuntary nighttime urination, is a common occurrence for many children. It’s often simply a developmental stage, though an embarrassing one. It is most common for children under the age of 6 or 7, and most will outgrow it beyond this age. Between ages 8 and 11, fewer than 5% of children continue to have a problem with bed-wetting. It’s generally not a cause for concern because nighttime bladder control may not yet be established.