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Bed-wetting, which is technically referred to as enuresis, is common in children up to about age three. Although diagnosed as a disorder (primary enuresis) after age three, it does not necessarily indicate a serious problem (e.g., at least 15 percent of all children continue bed-wetting up to age five). In some adults bed-wetting is related to physiological disorders or to a congenitally small bladder, but it is more often the result of excessive stress.
Contrary to what one might anticipate, bed-wetting is not associated with dreams. Most typically, episodes of enuresis occur in the first third of the evening, during non-REM (rapid eye movement) sleep (a time of low dream activity).