The process of passing liquid waste from the body: "Enuresis involves the involuntary discharge of urine; especially, by children at night."

"There are also many examples of enureses of older people who wet their beds because they can't control their urinations because the efficiency of the sphincter muscles surrounding the urethra diminishes with age."

"There are various causes of enuresis, including: kidney problems, bladder dysfunction, or psychological stress."

"Enuresis is common with about ten percent of children still wetting their beds at the age of five years, and many of these continue to do so until the age of eight or nine."

"A slightly higher number of boys than girls have enuresis."