Bedwetting is common for children, affecting more boys than girls. The condition occurs in approximately 15% of children at the age of 5 years, 7% of children at the age of 8, and declines to 1% to 2% of children by the age of 15 years. It continues to affect 0.5% into adulthood. Although children develop bladder control at different rates, most boys can control their bladder during the day and night by the age of 6, and most girls by the age of 5. When a child who is old enough to have bladder control urinates accidentally while sleeping, it's called nocturnal enuresis.